Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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assume that the random variable x is normally distributed, with mean μ …
The probability \(P(X\leq45)\) is \(0.3085\). For the graph, the region to the left of \(x = 45\) (since we are calculating \(P(X\leq45)\)) should be shaded. If we assume that in …
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assume the random variable x is normally distributed with mean \\( \\mu…
C.
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a population has a mean $mu = 168$ and a standard deviation $sigma = 23…
The mean is $\mu_{\bar{x}} = 168$, and the standard deviation is $\sigma_{\bar{x}}=3.221$.
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making a compromise can mean doing something that you would rather not …
- First option: I suggested we meet at 3 pm, but Derek suggested 5 pm. We agreed on 4 pm. - Third option: My cousin and my friend have the same birthday. I had dinner with my cous…
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a pair of standard dice are rolled. find the probability of rolling a s…
\(\frac{1}{18}\)
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find the expected value (μ) of the random variable with the given proba…
\(2.8\)
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graph the line with slope $-\\frac{1}{2}$ passing through the point $(4…
Plot the point \((4,2)\). From \((4,2)\), use the slope \(m =-\frac{1}{2}\) (which means for every 2 units we move to the right, we move 1 unit down; or for every 2 units we move …
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the stem - and - leaf plots compare the ages of 30 actors and actresses…
a. \(37\) years old b. \(43\) years c. \(41\) years old
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the histogram shows the starting salaries (rounded to the nearest thous…
A. True, because the sum of the heights of the first two bars in the graph is greater than the sum of the heights of the last two bars.
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a professor had students keep track of their social interactions for a …
\(5\)
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assume a significance level of \\( \\alpha = 0.05 \\) and use the given…
A. There is not sufficient evidence to support the claim that the standard deviation of pulse rates of the group of adult males is more than 12 bpm.
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assume that the random variable x is normally distributed, with mean \\…
The probability \(P(X\leq46)\approx0.4129\). Regarding the normal - curve shading: The region to the left of \(x = 46\) (since \(P(X\leq46)\) represents the area under the normal …
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bloomington counted how many times people used the public pool last mon…
\(4.5\)
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some states now allow online gambling. as a marketing manager for a cas…
\(4148\)
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determine the area under the standard normal curve that lies between (a…
\(0.1094\)
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samples of dna are collected, and the four dna bases of a, g, c, and t …
B. The confidence interval can be used to estimate that, with 90% confidence, the interval from \(2.0\) to \(3.2\) actually contains the true mean DNA base of all people.
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in a study of cell phone usage and brain hemispheric dominance, an inte…
\(z\approx - 2.93\)
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to determine if there is a relationship between grade performance and e…
C. 5.86
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find each of the following. enter your answers rounded to at least two …
For the 99% confidence interval: \(z_{\alpha/2} = 2.58\) For the 87% confidence interval: \(z_{\alpha/2} = 1.51\)
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what is the margin of error? your answer the difference between the low…
the maximum likely difference between the point estimate of a parameter and the actual value of the parameter
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how long was salma in the store?
\(4\) minutes
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what is the margin of error? the difference between the low and high va…
the maximum likely difference between the point estimate of a parameter and the actual value of the parameter
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how long did the temperature hold steady for? answer
1 hour
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which statement primarily appeals to ethos to support the position that…
The first statement ("After switching to a standing desk—like many Americans, I used to spend most of my day sitting—I experienced subtle but meaningful health benefits: I improve…
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the erie canal: a opened the interior of new york and transformed the f…
A. Opened the interior of New York and transformed the frontier into a prosperous commercial area.
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how hot was it when the temperature held steady? answer °f
\(71\)
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10. the total change in the outdoor temperature over 6 hours was -21°f.…
$-3.5$
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at the roslindale library, there are 6 books with white main characters…
a. No. The ratio \(6:4\) is a proportion. The actual number of books is a multiple of \(6 + 4=10\) (e.g., \(10\), \(20\), \(30\) etc.). b. \(8\) c. \(16\) d. \(30\)
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9. an equation is shown, where ( p < 0 ). ( pcdot q=r ) a. assume ( r >…
\(-3.5^{\circ}\text{F}\) per hour
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3 fill in the blank 2 points what agreement signed by the united states…
3. Kellogg - Briand Pact 4. A. The 18th Amendment
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8. complete this analogy. page : book :: _____________: bike a) pedal b…
- 8. A. pedal - 9. We can eat in the cafeteria, take a picnic basket to the park, or go home for lunch. - 10. denotation
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vocabulary for problems 1 - 5, choose the correct term or terms from th…
The expression is \(\frac{5\frac{1}{2}}{\frac{1}{2}}\) (or \(\frac{11/2}{1/2}\)), the strategy is to use the division of fractions (since we want to find out how many times the we…
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what is one argument in opposition to american imperialism? the united …
American principles traditionally opposed colonization.
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1. before a school dance, the organizing committee did a survey of stud…
a) \(137\) people were surveyed. b) Approximately \(37.96\%\) of the people prefer rock music. c) Approximately \(36.8^{\circ}\) represent those who prefer R&B music.
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1 max kelmon, 13, has his own little version of a man cave in palo alto…
Game companies use research on gamers' actions (like studying their reactions) to tweak games.
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day 3 \metamorphosis,\ the word flashed across lilas vocabulary quiz. s…
1. B. A dramatic change in form or character 2. C. It reveals that connecting ideas leads to deeper understanding.
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i can compare two groups of numeric data. 12. in 5th period, a survey i…
a. Median of Band Class: \(4\), Median of Choir Class: \(5\) b. Band Class: Asymmetric distribution (skewed to the left or right depending on the tail). Choir Class: Symmetric dis…
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i can compare two groups of numeric data. in pleasantville, texas there…
a. greater than b. less than c. equal 11. - The \(4^{th}\) of July parade is skewed left (negatively skewed). - The New Year's Day parade is skewed right (positively skewed).
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suppose you are given the statistics ( n = 43 ) and ( s ^ { 2 } = 500 )…
\(25.695,60.481\)
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suppose you are given the statistics ( n = 43 ) and ( s ^ { 2 } = 500 )…
\(25.695,60.481\)
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a guidance counselor at lincoln high school in boston, ma wants to anal…
1. \(0.65\) 2. The probability is \(0.65\). We use the sample proportion (number of students with score less than \(20.8\) in the sample divided by total sample size) as an estima…
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find the average of these numbers: 3, 3, 3, 3, 3, 3, 3, 4, 5, 6, 7* 5 p…
3.9
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what does boer mean? fishermen farmer slave rewatch
Farmer
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i can solve problems using data represented in dot plots. 8. a pediatri…
a. \(12\) b. \(28\%\) c. \(9\), \(10\), \(17\)
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consider the excerpt and theme from gilgamesh: a new english version. e…
People can depend on their god(s).
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which sentence has an underlined word that means \leave\? during a fire…
During a fire drill, we evacuate the building.
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1. what does adam smith mean by the word \produce\ in the wealth of nat…
A. “Produce” means food grown by farmers and manufactured goods like textiles and machinery.
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9. a social researcher claims that the longer people stay in their job,…
\(4\)
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which sentence uses an antonym clue to help the reader determine the me…
The former king was adored by the people for his reasonable decisions, but the new king was disliked for his arbitrary decisions.
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how is the number of minutes related to the number of words? minutes ? …
The number of words \(w\) is related to the number of minutes \(t\) by the equation \(w = 15t\) (or \(t=\frac{w}{15}\)), meaning the number of words is 15 times the number of minu…
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which of the following functions is an appropriate model for the data s…
B. quadratic, \( f(x)=ax^{2}+bx + c,a > 0 \)
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5 from unit 3, lesson at a restaurant, the total bill and the percentag…
a. The best - fit line estimates the percentage of the bill left as a tip is \(17.62\%\) when the bill is \(\$15\), and this is reasonable. b. The best - fit line predicts the per…
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from unit 3, lesson 4 a seed is planted in a glass pot, and its height …
a. The slope of the best - fit line is \(0.404\). It means the plant's height increases by \(0.404\) cm per day. It is reasonable. b. The y - intercept of the best - fit line is \…
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which of these scatter plots is best fit by the shown linear model?
A.
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a clue that helps the reader to understand a words meaning by using a c…
synonym
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arlington national cemetery: its history, significance, and meaning to …
1. Arlington 2. Civil 3. Unknown 4. military - service members 5. Veterans
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multiple choice 1 point what does the phrase \unearned power conferred …
Privilege is embedded within societal systems, favoring certain groups
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read the e - mail. in the interest of public safety, griffin avenue sho…
Due to the number of accidents, the writer feels that Griffin Avenue needs a traffic light.
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1) find the z - score corresponding to the 90th percentile
The \(z\) - score corresponding to the \(90^{th}\) percentile is approximately \(1.28\)
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read the passage from a dolls house. nora: really! did a big dog run af…
They show that Nora goes from playing happily with her children to being startled by Krogstad, an unwelcome visitor.
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use the ogive below to answer questions 2 & 3. 2. what is the percentil…
2. C. 85 3. C. 29
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4) a machine produces bottles with volume (mu = 500ml,sigma = 5ml). fin…
\(0.8185\)
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question 5 of 5 select the correct answer. a childrens shoe designer co…
A. A child's shoe size is correlated to, but not caused by, the child's age.
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4. scores on the teacher training college entrance exam had a mean of 5…
\(x = 60\), so the answer is D.
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practice exercises 1. scores on an sssce social studies paper had a mea…
B. 8
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find the mean of 10, 4, 2, 8 graphically. 10 + 4 + 2 + 8 = 24 average =…
\(6\)
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find the mean of 10, 4, 2, 8 graphically. 10 + 4 + 2 + 8 = 24 average =…
The mean of the numbers \(10\), \(4\), \(2\), \(8\) is \(6\).
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find the mean of 10, 4, 2, 8 graphically. 10 + 4 + 2 + 8 = 24 what is t…
\(6\)
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find the mean of 10, 4, 2, 8 graphically. what is the sum of the number…
24
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question find the median and mean of the data set below: 48, 26, 6, 26 …
Median \(=26\), Mean \(=26.5\)
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find the median and mean of the data set below: 29, 41, 41, 7, 40, 2, 1…
Median = \(29\), Mean = \(23\)
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find the median and mean of the data set below: 47, 15, 6, 49, 45, 30 a…
Median \(=37.5\), Mean \(=32\)
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comparing arguments from diverse perspectives quiz complete read the tw…
Passage 1 uses empirical evidence, while passage 2 uses logical evidence.
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multiple - choice question which sentence is the non reflexive one? (me…
Yo lavo la cara.
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what makes \yo me lavo la cara\ mean \i wash my face\? the reflexive pr…
the reflexive pronoun "me"
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body temperature (in degrees fahrenheit) of randomly selected normal an…
A. The mode(s) is/are \(98.6^{\circ}F\)
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name date tracking a dive diagnostic assessment marcus and raj are disc…
I agree with Marcus. Marcus correctly applied the zero - product property (if \(ab = 0\), then \(a = 0\) or \(b=0\)). Raj incorrectly applied the zero - product property. The zero…
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which of the following is not an equivalent expression for the confiden…
D. \(161.7\pm27.8\)
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refer to the accompanying data display that results from a simple rando…
a. The confidence interval is \(85.74\lt\mu\lt91.76\) (already given in the problem statement). b. The best point estimate of \(\mu\) is \(88.75\) minutes. The margin of error \(E…
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refer to the accompanying data display that results from a simple rando…
\(85.74\) min \(<\mu<91.76\) min
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some states now allow online gambling. as a marketing manager for a cas…
a. \(n = 4148\) b. \(n = 2341\)
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se hablan can mean \he talks to himself\. falso cierto
Falso
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it turns out that once kids have some proficiency 2 in a task, the exci…
B. discouraged
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15 another corner pictured the vain woman of troy, who had been turned …
A. rudeness
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in one corner of the web, she wove her conquest over the sea god poseid…
B. Arachne does not respect the gods.
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a ball is thrown straight up into the air. the table shows the data col…
The maximum height of the ball was reached \(2.5\) seconds after it was thrown.
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in silence the two began to weave, and the nymphs stole nearer, coaxed …
A. They show that Athena is indeed a better weaver than Arachne.
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what helps to ensure that the meaning of prose is clear to the reader? …
C. Careful organization
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what is the meaning of \prudent\ as it is used in paragraph 7? a. capab…
B. careful
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much a rewards customer pays based on the number of ounces of frozen yo…
A rewards customer earns 2 free ounces of yogurt because the total amount paid for 10 ounces and 12 ounces is the same.
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based on the word root, which word means \a statement or idea of an opp…
C. contradiction
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literally translated, what does \(yo) me llamo\ mean? she calls herself…
I call myself
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which sentence uses an antonym clue to help the reader determine the me…
The former king was adored by the people for his reasonable decisions, but the new king was disliked for his arbitrary decisions.
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what does the structure of the word \altruistic\ tell the reader about …
The suffix tells the reader that the meaning is related to "having the quality of something."
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read the sentence. the offices boisterous celebration, full of cheering…
rowdy
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read the following sentences. juanita used her affinity for numbers in …
an enjoyment of
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which affixes mean \without\? select two options. a- -cy -ology -ic int…
a - and im -
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which word contains a word root that means \believe\? credential dictio…
credential
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read the excerpt from grendel. i was safe in my tree, and the men who f…
He is careful and respectful of animal life.
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its unlikely that the thought of sending a casual text or making a list…
A. The Hunger Games book series, D. An article in Time magazine, E. A complaint letter to a restaurant