统计与概率
数据分析、概率分布、假设检验与统计方法。
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to find probability, divide the number of _________ by the number of tr…
1. B. outcomes 2. A. \(1/4\)
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5. in a literary analysis essay, what do you call the sentence that mak…
B. thesis statement
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to find probability, divide the number of _________ by the number of tr…
For the first question: B. outcomes For the second question: A. 1/4
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4. what does the term /logical/ mean? to declare something strongly to …
C. sensible and consistent
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3. when considering debate topics, what does controversial mean? reliab…
D. arguable
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2. which word has a similar meaning to refute? declare disprove clarify…
B. disprove
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4. what does the term relevance mean? something that is true, accurate,…
D. a state of being related and important
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4. which term has a similar meaning to the word concise? inflected smar…
D. brief
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5. which phrase best defines the term rhetoric? a brief, concise statem…
C. the art of using effective word choices and figurative language to persuade
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4. what does the word eflective\ mean when you are talking about a refl…
B. describing and analyzing a previous experience
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3. which term has the same meaning as the word opinion? evidencereflect…
D. belief
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4. which term describes the entire process of drawing conclusions about…
C. literary analysis
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2. which phrase best describes what it means to interpret text? describ…
C. explain what it means, based on evidence
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1. which term has a similar meaning to the word analysis? statement cla…
D. investigation
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5. what does collaboration mean? reading the same book at the same time…
C. working together to achieve a common goal (assuming the third option is labeled C; adjust label as per original, but the text is "working together to achieve a common goal")
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discussion questions • in lines 619 - 620, the poem describes grendels …
- **Grendel's severed head**: The sight of Grendel's severed head was weird because it was a reminder of the violence and horror of the battle. It was wonderful because it was a s…
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the box plot above summarizes the resting heart rates, in beats per min…
62
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the day has finally come, and youre ready to record. you and your guest…
Speak clearly and explain any technical or academic language the audience may not know.
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in this section, youll mediate a group discussion by responding thought…
C. Allow each group member time to speak and encourage other members to listen carefully.
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shown below are the scatter plots for four data sets. answer the questi…
(a) Data set in Figure 1. (b) Data set in Figure 2, Data set in Figure 3.
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learning targets • i can describe the shape of a distribution using the…
1. a) bell - shaped, c) symmetric 2. d) skewed right 3. b) bimodal 4. b) skewed right 5. d) uniform
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bridge 1: suspicious descriptions for each picture and description (a -…
- a. Agree. The histogram is symmetric with a central peak. Mean - b. Agree. The dot - plot is symmetric. Mean - c. Disagree. The histogram is not uniform (it is increasing). Medi…
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youre telling your friend alex about your plan of creating a youtube ch…
B. A counterclaim is an argument that tries to discredit the original claim.
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as you wrap up your analysis of both pieces, you realize that theres a …
Futile
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in this section, youll evaluate various texts from different time perio…
Idea
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in his letter, dr. king addresses false statements and fallacies presen…
One must wait for the right time to act or demand justice.
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next, you analyze the excerpt for word choice and meaning. you skim bac…
"...math is calculated by abacus"
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relationships, and nuances in word meanings. you continue to focus on t…
The author employs a sarcastic tone to showcase the outdated methods of education before technology.
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you reread the excerpt to identify the bold word and how it enhances th…
It shows the reader that the Gen Xers consider themselves defenders against the takeover of technology.
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you continue to read the article and focus on how the writer uses irony…
The author uses irony to show that many people who are angry about technology use it when they want.
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the weights (to the nearest five pounds) of 36 randomly selected male c…
A. The modal weight is \(162.5\) pounds
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find the median for the following group of data items. 24, 21, 20, 19, …
\(20.5\)
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find the mean for the data items in the given frequency distribution. t…
$4.391$
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find the mean for the following group of data items. 5, 2, 3, 8, 9, 6, …
\(5.375\)
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as of 2011, the following are the ages at which a countrys presidents w…
| Age | Frequency | |----|----| | 41 - 45 | 8 | | 46 - 50 | 6 | | 51 - 55 | 6 | | 56 - 60 | 10 | | 61 - 65 | 5 | | 66 - 70 | 5 |
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describe what is meant by a random sample. choose the correct answer be…
C. A random sample is a sample obtained in such a way that every element in the population has an equal chance of being selected for the sample.
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1. what does the term \equivalent\ mean? greater than equal unrelated l…
B. equal
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in suburbs of large cities,15 new residents move in each year. of those…
C. After five years, there are 60 new residents in a suburb.
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the height of a lake decreases by 20 in over a period of time. the heig…
D. The time it takes for the lake to decrease in height by 20 in is 4 weeks.
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which of the following statements do you recognize as being false as n,…
The range of the data becomes larger as \( n \) increases.
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sampling vanability in the sample proportion quick check use the table …
Sample number 3 (assuming the options include sample number 3, and the calculation shows sample 3 has the greatest proportion among valid samples, considering possible typo in sam…
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what refers to the process of selecting items from a population in orde…
B. sampling
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which of the following samples will have the mean closest to the popula…
The sample with a standard deviation of 12 and a sample size of 8 (the third option).
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differentiate between the following scenarios. which scenario is an exa…
D. Thirty students were randomly selected from Mrs. Calzada’s group of 158 students. They were asked how many hours they spend watching TV every day. The mean number of hours was …
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the age, in years, of 10 randomly selected passengers on a flight from …
33 years
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a sample of 15 hospitals in texas had a mean wait time of 48 minutes. t…
A. $\bar{x} = 48$ minutes and $\mu = 53$ minutes
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in a jar, there are blue, orange, and yellow marbles. the probability o…
1. \(42\) 2. \(14\) 3. \(16\) 4. \(\frac{8}{21}\)
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there are 16 oranges and 14 apples in a basket. three - eighth of the o…
$\frac{3}{4}$
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15 m = {2, 3, 5, 7, 11, 13} n = {1, 2, 3, 4, 5, 6, 7, 8} 1. if a number…
1. \(0.25\) 2. \(\frac{3}{4}\)
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a box has green and white thumb pins. the probability of picking a gree…
35
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there are 15 boys and some girls in a class. the total number of studen…
1. \(\frac{5}{8}\) 2. \(\frac{3}{8}\)
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the probability of picking a white ball from a bag is 0.3. the probabil…
\(0.4\)
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the median of 5, 7, 2, 9, 8 is: 1 point 5 7 8 6
7
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the median of 5,7,2,9,8 is: 1 point 5 7 8 6
7
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the yupno people of the remote finisterre range of papua new guinea do …
A. preoccupied with
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1 multiple choice 1 point which of the following is the null hypothesis…
There is no significant difference between the means of the two groups being compared.
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the research hypothesis is symbolized as h₁ h h h₀
\(H_1\)
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in calculating the standard error, the population standard deviation is…
the sample standard deviation.
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3 multiple choice 1 point according to the central limit theorem, if th…
approximately normal.
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5 multiple choice 1 point the probability associated with failing to re…
Type II error.
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match the following statements a statement of o difference\ that contra…
1. null hypothesis 2. two - tailed 3. right - tailed 4. Falsifying the null
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what does \purpose\ mean?
a reason
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numbers that describe diversity in a distribution are referred to as me…
variance
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numbers that describe diversity in a distribution are referred to as me…
dispersion
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youre happy with your conversation with eli and tell him he is \moving …
B. To make an effort to achieve something
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consider the following hypothetical scores: 21, 25, 37, 38, 39, 42, 44,…
\(12\)
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eli has finished reading the book, so you ask him to fill out a reflect…
A. Athletic and energetic
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calculate the range for the following sub - sample: 2, 7, 4, 4, 1, 2, 2…
\(6\)
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calculate the values of the mean for the following sub - sample: 2, 7, …
The mean is approximately \(3.08\)
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you take eli to the childrens sports section of the library. eli grabs …
D. Use the surrounding words or context
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you have a part - time job babysitting your neighbors son eli. twice a …
Very careful and precise
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in a survey sample of 83 respondents, about 30.1 percent of the sample …
\(0.251\) to \(0.351\)
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in a survey sample of 83 respondents, about 30.1 percent of the sample …
$0.251$ to $0.351$
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in a survey sample of 83 respondents, about 30.1 percent of the sample …
\(0.2507\) to \(0.3513\)
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select all that apply. if the sample standard deviation of a sample n =…
the upper bound with 95% confidence level is 3.10, the lower bound with 95% confidence level is 2.78
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5 multiple answer 1 point select all that apply. if a 95% confidence le…
B. there is a 5% chance of the interval being incorrect, D. the probability of a selected sample falling in this interval is 0.95.
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assuming that a sample (n = 504) has a sample standard deviation of 2.2…
C. 3.16
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3 numeric 1 point assuming that a sample (n = 625) has a sample standar…
\(0.09\)
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2 multiple choice 1 point the radius of a confidence interval is called…
margin of error.
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below is a table representing data, measuring the percentage of various…
The obtained \(Z\) test is \(-2.33\). The probability of obtaining this \(Z\) - test statistic is \(0.02\). This is less than our alpha level. Therefore, we reject the null hypoth…
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according to a report published by the pew research center in 2010, 61%…
The 99% confidence interval is $(0.56, 0.67)$ (rounded to two decimals).
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according to a report published by the pew research center in 2010, 61%…
The $99\%$ confidence interval is $55.53\%$ to $66.47\%$.
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according to a report published by the pew research center in 2010, 61%…
The 95% confidence interval is from \(56.84\%\) to \(65.16\%\)
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the table below shows some prices at a produce stand. produce price per…
No, she will not be able to buy 3.4 pounds of onions.
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question 9 of 10 what is the range of the following data values? 48, 61…
B. 34
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the bowling scores for six people are: 27, 142, 145, 146, 154, 162 what…
C. The median
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what is the mean of the following data values? 22, 37, 49, 15, 82 a. 41…
A. 41
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if data set a has a larger standard deviation than data set b, data set…
B. False
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what is the median of this data set? 24, 28, 51, 54, 67, 70 a. 51 b. 54…
C. 52.5
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these are the means and standard deviations for samples of prices from …
B. Brand A has a higher average price than brand B. D. Brand A's prices are less spread out than brand B's prices.
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question 2 of 10 for the data set 6, 5, 10, 11, 13, the mean, x, is 9. …
B. 3.4
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question 1 of 10 the mean height of a group of students is 65.4 inches.…
B. The new mean height will be greater than 65.4 inches.
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3. school dance the sign below indicates the cost of attending the big …
The x - intercept is \(160\) (when \(y = 0\), it means 160 Fr/Soph tickets sold with 0 Jr/Sr tickets sold). The y - intercept is \(64\) (when \(x = 0\), it means 64 Jr/Sr tickets …
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question 3 express the following using exponents. \\( \\sqrt5{16 x^{1} …
Question 3: \(2(\frac{4}{5})x^{3}y(\frac{7}{5})\) (the first option if we assume the notation \(a(b)\) means \(a^{b}\)) Question 4: None of the options are correct. But if we assu…
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1. football tyrell plays running back and kicks field goals for his tea…
The x - intercept is \(4\) and the y - intercept is \(8\). The x - intercept \((4,0)\) means if there are \(0\) field goals, there are \(4\) touchdowns. The y - intercept \((0,8)\…
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10. money monty has a total of $290 in ten dollar and five dollar bills…
The x - intercept \((29,0)\) means 29 ten - dollar bills and 0 five - dollar bills. The y - intercept \((0,58)\) means 0 ten - dollar bills and 58 five - dollar bills.
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george box, a famous statistician, once said, \all models are wrong, bu…
George Box meant that models (e.g., statistical, mathematical) are simplifications of real - world phenomena and cannot perfectly represent the complexity of reality (so "all mode…
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identifying the correct residual plot a scatterplot consists of (1, 4.0…
The second residual plot (from the left) is correct. (Assuming the options are labeled left to right as 1st, 2nd, 3rd, 4th; the 2nd plot matches the calculated residuals.)
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the line of best fit to model the data in the table is ( y = 5.2x - 0.4…
-1.6
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which statements describe a residual plot for a line of best fit that i…
- There are about the same number of points above the x - axis as below it. - The points are randomly scattered with no clear pattern. - The number of points is equal to those in …