Question 1

The April precipitation amounts (in inches) for 10 cities are listed below. Find the range of the data.

Accepted Answer

A)  2.45 inches 
B)  1.4 inches 
C)  2.8 inches 
D)  3.2 inches 
A)  2.45 inches 
B)  1.4 inches 
C)  2.8 inches 
D)  3.2 inches

Question 2

A random sample of sale prices of homes yielded the following summary information:
   
Comment on a home that had a sale price of $425,000.

Accepted Answer

A)  This sale price would be expected since it falls inside the lower and upper fences. 
B)  This value falls outside the upper fence and is considered an outlier. 
C)  This sale price falls between the lower and upper fences. It can be considered a potential outlier. 
D)  This value falls outside of the third quartile, but cannot be considered an outlier. 
A)  This sale price would be expected since it falls inside the lower and upper fences. 
B)  This value falls outside the upper fence and is considered an outlier. 
C)  This sale price falls between the lower and upper fences. It can be considered a potential outlier. 
D)  This value falls outside of the third quartile, but cannot be considered an outlier.

Question 3

The accompanying data set contains quiz scores for 12 students in a chemistry class: 18, 15, 5, 8, 15, 20, 2, 16, 10, 12, 20, 15.
a. Find a measure of central tendency that separates the data into two groups such that each groupconsists of 50% of the scores above and 50% of the scores below that measure.
b. Find a measure of central tendency that represents the quiz score that occurs most often.
c. Find a measure of central tendency that represents the average of the 12 quiz scores.

Accepted Answer

a. median

Question 4

For the following data, approximate the mean weekly grocery bill.

Accepted Answer

A)  $ 146.50 
B)  $ 150.00 
C)  $ 148.00 
D)  $ 146.00 
A)  $ 146.50 
B)  $ 150.00 
C)  $ 148.00 
D)  $ 146.00

Question 5

Compute the range for the set of data.
-0.224, 0.114, 0.451, 0.435, 0.645, 0.338

Accepted Answer

A)  0.114 
B)  0.531 
C)  0.368 
D)  0.645 
A)  0.114 
B)  0.531 
C)  0.368 
D)  0.645

Question 6

Compute the range for the set of data.
-6, 16, 6, 16, 6, 16, 6, 16

Accepted Answer

A)  10 
B)  11 
C)  20 
D)  16 
A)  10 
B)  11 
C)  20 
D)  16

Question 7

Find the sample standard deviation.
-115, 251, 179, 138, 112, 100, 151, 127, 105

Accepted Answer

A)  45.1 
B)  2291.8 
C)  2037.1 
D)  47.9 
A)  45.1 
B)  2291.8 
C)  2037.1 
D)  47.9

Question 8

Given the following five-number summary, find the IQR. 2.9, 5.7, 10.0, 13.2, 21.1.

Accepted Answer

A)  7.1 
B)  18.2 
C)  7.5 
D)  11.1 
A)  7.1 
B)  18.2 
C)  7.5 
D)  11.1

Question 9

A severe drought affected several western states for 3 years. A Christmas tree farmer is worried about the drought's effect on the size of his trees. To decide whether the growth of the trees has been retarded, the farmer decides to take a sample of the heights of 25 trees and obtains the following results (recorded in inches):   The tree farmer feels the normal height of a tree that was unaffected by the drought would be 65 inches. Find the z-score for a tree that is 65 inches tall.

Accepted Answer

A)  z = 0.98 
B)  z = 0.98. 
C)  z = 0.77 
D)  z = 0.84 
A)  z = 0.98 
B)  z = 0.98. 
C)  z = 0.77 
D)  z = 0.84

Question 10

A group of 79 students were asked how far they commute to work from home each time they go to work from home. The results are given below. Would a drive of 15 miles be considered an outlier?

Accepted Answer

A) True 
 B)False

Question 11

Find the sample standard deviation.
-13, 14, 15, 16, 17

Accepted Answer

A)  1.3 
B)  1.5 
C)  2.5 
D)  1.6 
A)  1.3 
B)  1.5 
C)  2.5 
D)  1.6

Question 12

The following data represents a random sample of 15 complaints registered with the customer service department of a store. Determine the median complaint.

Accepted Answer

A)  Messy store 
B)  No median 
C)  Defective product 
D)  Excessive waiting time 
A)  Messy store 
B)  No median 
C)  Defective product 
D)  Excessive waiting time

Question 13

For the following data set, approximate the sample standard deviation of monthly telephone bills (in dollars).

Accepted Answer

A)  $3.11 
B)  $9.65 
C)  $58.60 
D)  $93.12 
A)  $3.11 
B)  $9.65 
C)  $58.60 
D)  $93.12

Question 14

Compute the range for the set of data.
-6, 17, 3, 13, 12

Accepted Answer

A)  17 
B)  3 
C)  14 
D)  6 
A)  17 
B)  3 
C)  14 
D)  6

Question 15

The number of goals scored by a random sample of 16 hockey players for a given season are 5, 3, 21, 10, 7, 2, 0, 30, 19, 6, 4, 7, 10, 5, 7, and 24. Compute the mean, median, and mode.

Accepted Answer

mean = 10

Question 16

Compute the range for the set of data.
-2.4, 5.6, 1.5, 4.2, 6.4, 3.2

Accepted Answer

A)  3.9 
B)  1.5 
C)  4.9 
D)  6.4 
A)  3.9 
B)  1.5 
C)  4.9 
D)  6.4

Question 17

Compute the range for the set of data.
-120, 553, 133, 641, 398, 335

Accepted Answer

A)  363.3 
B)  641 
C)  521 
D)  120 
A)  363.3 
B)  641 
C)  521 
D)  120

Question 18

When results from a scholastic assessment test are sent to test-takers, the percentiles associated with their scores are also given. Suppose a test-taker scored at the 9 8th percentile for their verbal grade and at the   percentile for their quantitative grade. Interpret these results.

Accepted Answer

A)  This student performed better than 2% of the other test-takers in the verbal part and better than   in the quantitative part. 
B)  This student performed better than 9 8% of the other test-takers in the verbal part and better than   in the quantitative part. 
C)  This student performed better than 9 8% of the other test-takers in the verbal part and better than 75% in the quantitative part. 
D)  This student performed better than 2% of the other test-takers in the verbal part and better than 75% in the quantitative part. 
A)  This student performed better than 2% of the other test-takers in the verbal part and better than   in the quantitative part. 
B)  This student performed better than 9 8% of the other test-takers in the verbal part and better than   in the quantitative part. 
C)  This student performed better than 9 8% of the other test-takers in the verbal part and better than 75% in the quantitative part. 
D)  This student performed better than 2% of the other test-takers in the verbal part and better than 75% in the quantitative part.

Question 19

Find the sample standard deviation.
-7, 5, 13, 18, 11, 17, 17, 20, 16

Accepted Answer

A)  5.2 
B)  26.7 
C)  23.7 
D)  4.9 
A)  5.2 
B)  26.7 
C)  23.7 
D)  4.9

Question 20

The high temperatures (in degrees Celsius) each day over a three week period were as follows: 17, 18, 20, 22, 21, 19, 16, 15, 18, 20, 21, 21, 22, 21, 19, 20, 19, 17, 16, 16, 17. Compute the mean, median, and mode.

Accepted Answer

mean = 18.

The April precipitation amounts (in inches) for 10 cities are listed below. Find the range of the data.

A random sample of sale prices of homes yielded the following summary information: Comment on a home that had a sale price of $425,000.

For the following data, approximate the mean weekly grocery bill.

Compute the range for the set of data. -0.224, 0.114, 0.451, 0.435, 0.645, 0.338

Compute the range for the set of data. -6, 16, 6, 16, 6, 16, 6, 16

Find the sample standard deviation. -115, 251, 179, 138, 112, 100, 151, 127, 105

Given the following five-number summary, find the IQR. 2.9, 5.7, 10.0, 13.2, 21.1.

A group of 79 students were asked how far they commute to work from home each time they go to work from home. The results are given below. Would a drive of 15 miles be considered an outlier?

Find the sample standard deviation. -13, 14, 15, 16, 17

The following data represents a random sample of 15 complaints registered with the customer service department of a store. Determine the median complaint.

For the following data set, approximate the sample standard deviation of monthly telephone bills (in dollars).

Compute the range for the set of data. -6, 17, 3, 13, 12

The number of goals scored by a random sample of 16 hockey players for a given season are 5, 3, 21, 10, 7, 2, 0, 30, 19, 6, 4, 7, 10, 5, 7, and 24. Compute the mean, median, and mode.

Compute the range for the set of data. -2.4, 5.6, 1.5, 4.2, 6.4, 3.2

Compute the range for the set of data. -120, 553, 133, 641, 398, 335

When results from a scholastic assessment test are sent to test-takers, the percentiles associated with their scores are also given. Suppose a test-taker scored at the 9 8th percentile for their verbal grade and at the percentile for their quantitative grade. Interpret these results.

Find the sample standard deviation. -7, 5, 13, 18, 11, 17, 17, 20, 16

The high temperatures (in degrees Celsius) each day over a three week period were as follows: 17, 18, 20, 22, 21, 19, 16, 15, 18, 20, 21, 21, 22, 21, 19, 20, 19, 17, 16, 16, 17. Compute the mean, median, and mode.

Data Collection

Organizing and Summarizing Data

Describing the Relation Between Two Variables

Probability

Discrete Probability Distributions

The Normal Probability Distributions

Sampling Distributions

Estimating the Value of a Parameter Using Confidence Intervals

Hypothesis Tests Regarding a Parameter

Inference on Two Samples

Inference on Categorical Data

Comparing Three or More Means

Inference of the Least-Squares Regression Model

Filters

Exam 3: Numerically Summarizing Data

The April precipitation amounts (in inches) for 10 cities are listed below. Find the range of the data.

A random sample of sale prices of homes yielded the following summary information: Comment on a home that had a sale price of $425,000.

For the following data, approximate the mean weekly grocery bill.

Compute the range for the set of data. -0.224, 0.114, 0.451, 0.435, 0.645, 0.338

Compute the range for the set of data. -6, 16, 6, 16, 6, 16, 6, 16

Find the sample standard deviation. -115, 251, 179, 138, 112, 100, 151, 127, 105

Given the following five-number summary, find the IQR. 2.9, 5.7, 10.0, 13.2, 21.1.

A group of 79 students were asked how far they commute to work from home each time they go to work from home. The results are given below. Would a drive of 15 miles be considered an outlier?

Find the sample standard deviation. -13, 14, 15, 16, 17

The following data represents a random sample of 15 complaints registered with the customer service department of a store. Determine the median complaint.

For the following data set, approximate the sample standard deviation of monthly telephone bills (in dollars).

Compute the range for the set of data. -6, 17, 3, 13, 12

The number of goals scored by a random sample of 16 hockey players for a given season are 5, 3, 21, 10, 7, 2, 0, 30, 19, 6, 4, 7, 10, 5, 7, and 24. Compute the mean, median, and mode.

Compute the range for the set of data. -2.4, 5.6, 1.5, 4.2, 6.4, 3.2

Compute the range for the set of data. -120, 553, 133, 641, 398, 335

When results from a scholastic assessment test are sent to test-takers, the percentiles associated with their scores are also given. Suppose a test-taker scored at the 9 8th percentile for their verbal grade and at the percentile for their quantitative grade. Interpret these results.

Find the sample standard deviation. -7, 5, 13, 18, 11, 17, 17, 20, 16

The high temperatures (in degrees Celsius) each day over a three week period were as follows: 17, 18, 20, 22, 21, 19, 16, 15, 18, 20, 21, 21, 22, 21, 19, 20, 19, 17, 16, 16, 17. Compute the mean, median, and mode.

Data Collection

Organizing and Summarizing Data

Describing the Relation Between Two Variables

Probability

Discrete Probability Distributions

The Normal Probability Distributions

Sampling Distributions

Estimating the Value of a Parameter Using Confidence Intervals

Hypothesis Tests Regarding a Parameter

Inference on Two Samples

Inference on Categorical Data

Comparing Three or More Means

Inference of the Least-Squares Regression Model

Filters