Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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read the excerpt from \daughter of invention\. \¡ya, ya!\ she waved the…
She does not want to dwell on something that cannot be changed.
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3. the scatter - plot shows the finishing times for the olympic gold me…
a. I do not agree with Dana. The linear association is strong negative because the points are closely clustered around the line of best - fit and as the years since 1960 increase,…
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3. the data show below give the total runs scored by both teams during …
(a) Boxplot with min=4, Q1=5, median=7, Q3=9, max=13. (b) Right-skewed. The right whisker (Q3 to max=13) is longer than the left (min=4 to Q1), indicating a longer right tail.
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select the option which best describes how market supply can be obtaine…
At each price, quantities supplied of all sellers in the market are added. Graphically, it means horizontally adding up the individual supply curves.
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use the sentence to answer the question. peter felt nervous as he walke…
D. anxious
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read the excerpt from julius caesar act 2 scene 1. decius. shall no man…
Mark Antony's life will be spared because he will be useless without Caesar.
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use the paragraph to answer the question. mayas mother offered her the …
a chance to get something she wanted
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the name mesopotamia literally translated means what? land of many gods…
B. Land between the rivers
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read the excerpt from act 2, scene 1, of julius caesar casca. let us no…
Casca firmly reverses his position about including Cicero, as if he hadn’t been the one to suggest it in the first place. Metellus thinks having gray hair is a sign of respectabil…
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what is the definition of the word: inference 3 points a direct quote f…
To identify a message that is not directly stated in a communication by inferring meaning, often based on context
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choose the term that best completes each sentence. 24. to amend the uni…
24. change 25. Article V 26. two - thirds 27. two - thirds 28. three - fourths 29. three - fourths
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use the venn - diagram to the right to determine the following set or c…
A. The expression $(A'\cap B)\cup(A\cap B)$ corresponds to the cardinal number [Cardinal - number - value] (Type a whole number)
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read the following sentence from the passage. afterwards, he jumped on …
A. got onto
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from speech to second virginia convention (1775) by patrick henry i thi…
D. to give free rein to
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read paragraph 2. what is the meaning of the phrase at stake? a causing…
D. at risk
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how did john d. rockefeller vertically integrate his monopoly in 1882? …
He created a trust that controlled oil wells, refineries, and distribution networks.
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which statement best describes standard oil in the late 1800s? standard…
Standard Oil owned ninety percent of all oil refineries in the United States.
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why was carnegie steel an example of vertical integration? the company …
The company controlled every step of steel production and distribution.
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exercises 1 - 2 1. explain the difference between qualitative variables…
1. Qualitative variables describe qualities, non - numerical; quantitative variables are numerical, represent amounts/counts. 2. Discrete have distinct values, counted; continuous…
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2. means showing a preference that might unfairly influence information…
2. Bias 3. Sequence of events 4. Historical inquiry question 5. Evidence 6. Interpretation 7. Historical research 8. Point - of - view 9. Primary source 10. Public policies 11. Se…
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applying the concepts 1 - 2 fatal transportation injuries read the foll…
1. Variables: Industry, Number of fatalities 2. Industry: Qualitative; Number of fatalities: Quantitative 3. Number of fatalities: Discrete 4. Industry: Nominal; Number of fatalit…
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identify the graph with the greatest variation. the mean in the graph i…
The first graph
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identify the graph with the least variation. the mean on each graph is …
The first graph
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use the venn - diagram to the right to determine the following set or c…
A. The expression $(A'\cap B)\cup(A\cap B)$ corresponds to the cardinal number 3.
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use the percentiles flow - chart interactive to answer the following qu…
D. The IQ score that is midway between the 70th and 71st scores in the sorted list
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directions: from video lecture #1 a question was posed and i want you t…
There is no single - correct answer as it is a self - reflective question. However, possible aspects could include citizenship status, adherence to American cultural values like f…
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use z - scores to compare the given values. the tallest living man at o…
Since the z - score for the tallest man is $z\approx10.15$ and the z - score for the shortest man is $z\approx - 14.02$, the shortest man had the height that was more extreme.
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in designing a work - desk, it is found that males have sitting knee he…
a. A. Heights that are less than $17.4$ in b. B. Heights that are greater than $26.2$ in c. A. Heights that are greater than $17.4$ in and less than $26.2$ in
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a successful basketball player has a height of 6 feet 3 inches, or 191 …
2.31
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the blood platelet counts of a group of women have a bell - shaped dist…
a. 99.7 b. 68
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use the body temperatures, in degrees fahrenheit, listed in the accompa…
within $0.2^{\circ}$ of
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use the body temperatures, in degrees fahrenheit, listed in the accompa…
The estimated standard deviation is $0.78^{\circ}F$. The estimated standard deviation is within $0.2^{\circ}F$ of the actual standard deviation. Thus, the estimated standard devia…
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2 the stem and leaf plots below show the grades for an exam in two diff…
(a) 1st class: 25, 44.5, 70.5, 96, 100; 2nd class: 21, 54.5, 65, 76, 100 (b) 1st class IQR = 51.5; 2nd class IQR = 21.5 (c) 1st class outlier(s) (if any) = None; 2nd class outlier…
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listed below are prices in dollars for one night at different hotels in…
The range of the sample data is $186.0$ dollars The standard deviation of the sample data is $55.8$ dollars The variance of the sample data is $3108.8$ dollars$^2$ A. The measures…
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9. what is the probability of spinning these two spinners and having ea…
$0.2$
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8. a nickel is tossed, a number - cube with faces labeled 1 - 6 is roll…
D. $\frac{1}{8}$
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arturo rolls two six - sided number cubes, with faces labeled 1 - 6, as…
6. B. $\frac{5}{36}$ 7. B. $\frac{1}{9}$
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use the following information for questions 6 and 7. arturo rolls two s…
B. $\frac{5}{36}$
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a random sample of 10 subjects have weights with a standard deviation o…
131.5094 kg²
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5. gina has a bag containing 5 red, 4 yellow, and 6 blue tiles that are…
D. $\frac{4}{45}$
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case is going to toss three coins simultaneously. what is the probabili…
1. D. $\frac{3}{8}$ 2. D. $\frac{1}{2}$
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histogram checklist: title the histogram bars are connected label the y…
1. 6-8 hours (or 8-10 hours, depending on interval definition) 2. 6-8 hours (most frequent interval) 3. Approximately 2.78% (if smallest frequency=1 and total=36)
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3. cadie is going to toss three coins simultaneously. what is the proba…
D. $\frac{3}{8}$
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listed below are amounts (in millions of dollars) collected from parkin…
A. The mean and the median for the security company are both lower than the mean and the median for the collections performed by other companies B. Since the security company appe…
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i am going to toss three coins simultaneously. what is the probability …
None of the provided options are correct. The correct probability is $\frac{3}{8}$.
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banquet hall has two types of tables, rectangular and round. the rectan…
a. The standard - form equation is \(4x + 3y=96\) b. The x - intercept is 24. It means that if no round tables are used, 24 rectangular tables are needed to seat 192 people. c. Th…
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2. what is the probability of tossing a number - cube labeled 1 - 6 and…
C. $\frac{1}{4}$
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choose the correct answer. 1. probability of the spinner a. $\frac{1}{2…
C. \(\frac{3}{8}\)
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1. what is the probability of the spinner? 2. what is the probability o…
C. \(\frac{3}{8}\) 2.
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which technique for gathering data (observational study or experiment) …
(a) This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured. (b)…
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(d) subscribers to a new smart phone app that streams songs were assign…
(d) simple random sample (e) stratified sample
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in line 66, when hektor says, \let me at least not die without a strugg…
He knows he is going to die but intends to die heroically.
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categorize the type of sampling (simple random, stratified, systematic,…
(a) cluster sample (b) convenience sample (c) systematic sample
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find the midrange for the following group of data items. 128, 68, 98, 6…
98
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find the mode for the data items in the given frequency distribution. |…
5
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for the following set of numbers, find the median. 43, 60, 56, 35, 40, …
$45$
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find the mean for the data items in the given frequency distribution. |…
$6.500$
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find the mean for the following group of data items. 8, 5, 3, 7, 2, 9, …
$4.75$
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this histogram shows the breakdown of exam scores in a math class. if a…
30
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1. the data show below give the total runs scored by both teams during …
a. | Total runs scored | Tally | Frequency | |-------------------|-------|-----------| | 4 | \| | 1 | | 5 | \||||\| | 6 | | 7 | \|\|\| | 3 | | 8 | \| | 1 | | 9 | \|\| | 2 | | 11 |…
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among fatal plane crashes that occurred during the past 50 years, 650 w…
Pilot error: 39.3% Other human error: 4.9% Weather: 4.6% Mechanical problems: 38.7% Sabotage: 12.4% D. Pilot error is the most serious threat to aviation safety. Pilots could be b…
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a pharmacy is presented with a prescription for 40 tablets of a schedul…
First question: 72 hr Second question: DEA
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a questionnaire was given to students in an introductory statistics cla…
140
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one option in a roulette game is to bet $6 on red. (there are 18 red co…
a. -$0.32$ b. B. This value represents the expected loss over the long run for each game played.
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use the accompanying radiation levels (in w/kg) for 50 different cell p…
14
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the numbered disks shown are placed in a box and one disk is selected a…
$\frac{1}{4}$
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(c) consider the experiment described in part (a). describe how you wou…
First, assign individuals to the three blocks based on age. Second, assign individuals to the three blocks based on age. Last, compute percentages of donors in each group for each…
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consider a political discussion group consisting of 4 democrats, 7 repu…
$\frac{1}{78}$
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a single die is rolled twice. find the probability of rolling a 3 the f…
$\frac{1}{36}$
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a radio talk show host asked listeners to respond either yes or no to t…
1. all listeners of the radio talk show 2. opinion of a listener 3. Yes, voluntary response. Those with the strongest opinions are most likely to call in.
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(c) what is the variable for question a? type of job number of students…
What is the variable for question A?: type of job Classify the variable as qualitative or quantitative.: qualitative What is the level of measurement?: nominal
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use the percentiles flowchart interactive to answer the following quest…
C. The IQ score that is midway between the 70th and 71st scores in the sorted list.
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(f) suppose only 46% of the students you selected for the sample respon…
54 Yes, the people choosing not to respond may have some characteristics that would bias the study. No, the sample frame is restricted to one campus.
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which of the following is not a value in the 5 - number summary? choose…
D. Mean
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(d) what is the variable for question b? rating of satisfaction of work…
- rating of applicability of work experience to future employment - qualitative - ordinal - statistic
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fill in the blank. whenever a data value is less than the mean, _______…
the corresponding z - score is negative
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(c) what is the variable for question a? o type of job o number of stud…
type of job qualitative nominal
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fill in the blank. a data value is considered ________ if its z - score…
significantly low or significantly high
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the following are the tolls of men by women in an experiment including …
30, 57.5, 65, 90, 100
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use the accompanying radiation levels (in \\( \frac{w}{kg} \\)) for 50 …
80
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listed below are blood groups of o, a, b, and ab of randomly selected b…
| Blood Group | Relative Frequency | | ---- | ---- | | O | 46.7% | | A | 40% | | B | 10% | | AB | 3.3% |
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use z scores to compare the given values. in a recent awards ceremony, …
Since the z - score for the winner of Best Actor is $z=-1.66$ and the z - score for the winner of Best Actress is $z = 1.02$, the winner of Best Actor had the more extreme age.
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in a particular class, exams are worth 50% of the overall grade, quizze…
$81.3$
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6. how does the description of the storm and fading colors add layers o…
6. The descriptions create mood, symbolize character states, and may foreshadow events, adding atmosphere and depth. 7. He may be rational - minded or outgrowing childhood fears, …
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find the weighted average of these values. value weight 3.00 75.0% 4.00…
$3.35$
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researchers measured the data speeds for a particular smartphone carrie…
a. $53.06$ b. $\frac{53.06}{20.17}\approx2.63$ c. $\frac{71.5 - 18.44}{20.17}\approx2.63$ d. Yes, since the z - score ($\approx2.63$) is greater than 2, the carrier's highest data…
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if your score on your next statistics test is converted to a z - score,…
A. The z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores.
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the boxplots shown below represent customer waiting times (minutes) for…
fewer customers have to wait a significantly longer time
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the boxplots shown below represent customer waiting times (minutes) for…
much less variation
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the boxplots shown below represent customer waiting times (minutes) for…
The waiting line represented by the bottom boxplot is better because the times have a smaller inter - quartile range so the waiting times are more consistent and generally lower.
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the boxplots shown below represent customer waiting times (minutes) for…
The waiting line represented by the bottom boxplot is better because the times have less variability so customers can expect more consistent waiting times.
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for the following description of data, identify the ws, name the variab…
1. C. Car manufacturers 2. B. horsepower, C. the manufacturer, D. vehicle type, E. weight, G. city gas mileage, H. highway gas mileage
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chunk 5 - paragraphs 32–37 12. why is the idea of being erased from exi…
12. Being erased means total negation of identity and all traces, while disappearing may leave some remnants. 13. Varies based on text clues like others' forgetfulness, vanishing …
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a successful basketball player has a height of 6 feet 4 inches, or 193 …
2.66
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the data in the table represent the height of an object over time. heig…
quadratic, because the height increases and then decreases
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for the following description of data, identify the ws, name the variab…
C. Car manufacturers
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identify the sampling techniques used, and discuss potential sources of…
What type of sampling is used? C. Cluster sampling is used, since the disaster area is divided into grids, and some of those grids are selected and everyone in those grids is inte…
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fill in the blank. the square of the standard deviation is called the _…
variance
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fill in the blank. for data sets having a distribution that is approxim…
the Empirical Rule
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fill in the blank. the range rule of thumb roughly estimates the standa…
s = $\frac{range}{4}$