A 1-pound bag of peanuts contained 430 peanuts. The distribution of weights (in grams) of the peanuts isgiven below . What is the sample standard deviation of the weight of a peanut? \[\begin{array} { | l | l | } \hline \begin{array} { l } \text { Weights } \\ \text { (grams) } \end{array} & { \text { Frequency } } \\ \hline 0.755 - 0.814 & 3 \\ \hline 0.815 - 0.874 & 2 \\ \hline 0.875 - 0.934 & 2 \\ \hline 0.935 - 0.994 & 2 \\ \hline 0.995 - 1.054 & 168 \\ \hline 1.055 - 1.114 & 241 \\ \hline 1.115 - 1.174 & 12 \\ \hline \end{array}\]

A) 0.045 g B) 0.002 g C) 0.209 g D) 0.000004 g A) 0.045 g B) 0.002 g C) 0.209 g D) 0.000004 g

The following data represent a random sample of 15 complaints registered with the customer servicedepartment of a store. Determine the mode complaint. $\begin{array}{lll} \text { defective product } & \text { rude personnel } & \text { messy store } \\ \text { other } & \text { defective product } & \text { defective product } \\ \text { other } & \text { excessive waiting time } & \text { other } \\ \text { defective product } & \text { other } & \text { other } \\ \text { rude personnel } & \text { defective product } & \text { other } \end{array}$

A) other B) defective product C) messy store D) no mode A) other B) defective product C) messy store D) no mode

For the following data, approximate the mean weekly grocery bill. \[\begin{array} { c | c } \text { Bill (in dollars) } & \text { Frequency } \\ \hline 135 - 139 & 13 \\ 140 - 144 & 7 \\ 145 - 149 & 11 \\ 150 - 154 & 18 \\ 155 - 159 & 9 \end{array}\]

A) $147.30 B) $145.30 C) $149.30 D) $145.80 A) $147.30 B) $145.30 C) $149.30 D) $145.80

The grades are given for a student for a particular term. Find the grade point average. The point values ofgrades are given below.A : 4, B : 3, C : 2, D : 1, F : 0 \[\begin{array} { c c } \text { Grade } & \text { Credit Hours } \\ \hline \text { C } & 3 \\ \text { F } & 1 \\ \text { D } & 2 \\ \text { F } & 2 \\ \text { F } & 3 \end{array}\]

A) 0.73 B) 2.2 C) 0.6 D) 1.8 A) 0.73 B) 2.2 C) 0.6 D) 1.8

A) 4 B) 17 C) 0.8 D) 13 A) 4 B) 17 C) 0.8 D) 13

For the following data, approximate the mean number of unused vacation days at the end of the year. \[\begin{array} { c | c } \text { Days } & \text { Frequency } \\ \hline 1 - 2 & 2 \\ 3 - 4 & 21 \\ 5 - 6 & 20 \\ 7 - 8 & 10 \\ 9 - 10 & 30 \end{array}\]

A) 6.6 B) 6.1 C) 7.1 D) 7.8 A) 6.6 B) 6.1 C) 7.1 D) 7.8

Exam 3: Numerically Summarizing Data

A 1-pound bag of peanuts contained 430 peanuts. The distribution of weights (in grams) of the peanuts isgiven below . What is the sample standard deviation of the weight of a peanut? Weights (grams) Frequency 0.755-0.814 3 0.815-0.874 2 0.875-0.934 2 0.935-0.994 2 0.995-1.054 168 1.055-1.114 241 1.115-1.174 12

(Multiple Choice)

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Question 81

The April precipitation amounts (in inches) for 10 cities are listed below. Find the range of the data.2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8

(Multiple Choice)

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Question 82

In the computation of the sample standard variance, how many degrees of freedom are there in a data set thathas 15 data values?

(Multiple Choice)

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Question 83

The following data represent a random sample of 15 complaints registered with the customer servicedepartment of a store. Determine the mode complaint. defective product rude personnel messy store other defective product defective product other excessive waiting time other defective product other other rude personnel defective product other

(Multiple Choice)

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Question 84

The percentage of measurements that are below the 88th percentile is

(Multiple Choice)

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Question 85

For the following data, approximate the mean weekly grocery bill. Bill (in dollars) Frequency 135-139 13 140-144 7 145-149 11 150-154 18 155-159 9

(Multiple Choice)

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Question 86

Many firms use on-the-job training to teach their employees new software. Suppose you work in the personneldepartment of a firm that just finished training a group of its employees in new software, and you have beenrequested to review the performance of one of the trainees on the final test that was given to all trainees. Themean and standard deviation of the test scores are 80 and 3, respectively, and the distribution of scores is bellshaped. What percentage of test-takers scored better than a trainee who scored 71?

(Multiple Choice)

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Question 87

11, 5, 11, 13, 16, 13, 19, 12, 12, 19

(Multiple Choice)

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Question 88

9, 20, 9, 20, 9, 20, 9, 20

(Multiple Choice)

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Question 89

The heights of ten male students (in inches) in a college biology class are listed below. Find the mean.71 67 67 72 76 72 73 68 72 72

(Multiple Choice)

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Question 90

0.23, 0.12, 0.554, 0.379, 0.575, 0.257

(Multiple Choice)

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Question 91

The grades are given for a student for a particular term. Find the grade point average. The point values ofgrades are given below.A : 4, B : 3, C : 2, D : 1, F : 0 Grade Credit Hours C 3 F 1 D 2 F 2 F 3

(Multiple Choice)

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Question 92

11, 11, 11, 14, 17, 17, 17

(Multiple Choice)

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Question 93

Which measure of central tendency may not exist for all numeric data sets?

(Multiple Choice)

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Question 94

112, 494, 230, 565, 401, 257

(Multiple Choice)

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Question 95

The top speeds (in mph) for a sample of five new automobile brands are listed below. Calculate the standarddeviation of the speeds.160, 125, 190, 185, 105

(Multiple Choice)

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Question 96

13, 14, 15, 16, 17

(Multiple Choice)

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Question 97

A pharmaceutical testing company wants to test a new cholesterol drug. The average cholesterol of the targetpopulation is 200 mg and they have a standard deviation of 25 mg. The company wished to test a sample ofpeople who fall between 1.5 and 3 z-scores above the mean. Into what range must a candidateʹs cholesterollevel be in order for the candidate to be included in the study?

(Multiple Choice)

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Question 98

For the following data, approximate the mean number of unused vacation days at the end of the year. Days Frequency 1-2 2 3-4 21 5-6 20 7-8 10 9-10 30

(Multiple Choice)

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Question 99

Which measure of central tendency is more representative of the typical observation if the graph of the data isskewed to the left?

(Multiple Choice)

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Question 100

The April precipitation amounts (in inches) for 10 cities are listed below. Find the range of the data.2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8

In the computation of the sample standard variance, how many degrees of freedom are there in a data set thathas 15 data values?

The percentage of measurements that are below the 88th percentile is

For the following data, approximate the mean weekly grocery bill. Bill (in dollars) Frequency 135-139 13 140-144 7 145-149 11 150-154 18 155-159 9

11, 5, 11, 13, 16, 13, 19, 12, 12, 19

9, 20, 9, 20, 9, 20, 9, 20

The heights of ten male students (in inches) in a college biology class are listed below. Find the mean.71 67 67 72 76 72 73 68 72 72

0.23, 0.12, 0.554, 0.379, 0.575, 0.257

The grades are given for a student for a particular term. Find the grade point average. The point values ofgrades are given below.A : 4, B : 3, C : 2, D : 1, F : 0 Grade Credit Hours C 3 F 1 D 2 F 2 F 3

11, 11, 11, 14, 17, 17, 17

Which measure of central tendency may not exist for all numeric data sets?

112, 494, 230, 565, 401, 257

The top speeds (in mph) for a sample of five new automobile brands are listed below. Calculate the standarddeviation of the speeds.160, 125, 190, 185, 105

13, 14, 15, 16, 17

For the following data, approximate the mean number of unused vacation days at the end of the year. Days Frequency 1-2 2 3-4 21 5-6 20 7-8 10 9-10 30

Which measure of central tendency is more representative of the typical observation if the graph of the data isskewed to the left?

Data Collection

Organizing and Summarizing Data

Describing the Relation Between Two Variables

Probability

Discrete Probability Distributions

The Normal Probability Distribution

Sampling Distributions

Estimating the Value of a Parameter

Hypothesis Tests Regarding a Parameter

Inferences on Two Samples

Inference on Categorical Data

Comparing Three or More Means

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