Exam 3: Describing Data: Numerical Measures

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the table below. What is the modal price of Unleaded gas? _______.

(Short Answer)

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Question 21

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the table below. What is the median price of Unleaded Plus gas? _______.

(Short Answer)

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Question 22

The sum of the deviations of each data value from this measure of central location will always be zero.

(Multiple Choice)

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Question 23

For a set of data arranged or sorted in numerical order, the value of the observation in the center is called the weighted mean.

(True/False)

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Question 24

A company's human resource department was interested in the average number of years that a person works before retiring. The sample of size 11 follows: What is the arithmetic mean? _________.

(Short Answer)

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Question 25

Extremely high or low scores affect the value of the median.

(True/False)

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Question 26

The Sea Mist Hotel collects customer satisfaction data daily. Yesterday the hotel was 99% occupied and the manager wanted to quickly assess customer satisfaction. She randomly selected ten scores. 100 points is the maximum score. The mean score is 82.1. The ten scores were What is the variance? ___________.

(Short Answer)

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Question 27

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the table below. What is the modal price of Unleaded Plus gas? _______.

(Short Answer)

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Question 28

A company studied the commissions paid to furniture salespersons. If the standard deviation is computed, what is the unit of measure? ___________

(Short Answer)

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Question 29

Which measure of central location requires that the data be ranked before it is possible to determine it? ____________

(Short Answer)

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Question 30

Dispersion describes the degree of variation in the data.

(True/False)

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Question 31

The arithmetic mean is the sum of the quantitative observations divided by the total number of observations.

(True/False)

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Question 32

The Investment Research Institute reported in its Mutual Fund Fact Book that the number of mutual funds increased from 5725 in 1999 to 7977 in 2009. What is the geometric mean annual percent increase in the number of funds?

(Multiple Choice)

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Question 33

What is a disadvantage of the range as a measure of dispersion?

(Multiple Choice)

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Question 34

The weights (in kilograms) of a group of crates being shipped to Panama are 95, 103, 110, 104, 105, 112 and 92. What is the mean deviation?

(Multiple Choice)

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Question 35

Chebyshev's Theorem is valid for any _____________________.

(Short Answer)

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Question 36

A question in a market survey asks for a respondent's favorite car color. Which measure of central location should be used to summarize this question?

(Multiple Choice)

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Question 37

When reporting descriptive statistics for a variable, why should the report include measures of location and dispersion?

(Essay)

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Question 38

A statistic computed by summing all of the values of a distribution and dividing by the number of values is called ____________.

(Short Answer)

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Question 39

If the variance of the "number of daily parking tickets issued" is 100, the variance is defined as

(Multiple Choice)

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Question 40

Showing 21 - 40 of 132

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the table below. What is the modal price of Unleaded gas? _______.

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the table below. What is the median price of Unleaded Plus gas? _______.

The sum of the deviations of each data value from this measure of central location will always be zero.

For a set of data arranged or sorted in numerical order, the value of the observation in the center is called the weighted mean.

A company's human resource department was interested in the average number of years that a person works before retiring. The sample of size 11 follows: What is the arithmetic mean? _________.

Extremely high or low scores affect the value of the median.

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the table below. What is the modal price of Unleaded Plus gas? _______.

A company studied the commissions paid to furniture salespersons. If the standard deviation is computed, what is the unit of measure? ___________

Which measure of central location requires that the data be ranked before it is possible to determine it? ____________

Dispersion describes the degree of variation in the data.

The arithmetic mean is the sum of the quantitative observations divided by the total number of observations.

The Investment Research Institute reported in its Mutual Fund Fact Book that the number of mutual funds increased from 5725 in 1999 to 7977 in 2009. What is the geometric mean annual percent increase in the number of funds?

What is a disadvantage of the range as a measure of dispersion?

The weights (in kilograms) of a group of crates being shipped to Panama are 95, 103, 110, 104, 105, 112 and 92. What is the mean deviation?

Chebyshev's Theorem is valid for any _____________________.

A question in a market survey asks for a respondent's favorite car color. Which measure of central location should be used to summarize this question?

When reporting descriptive statistics for a variable, why should the report include measures of location and dispersion?

A statistic computed by summing all of the values of a distribution and dividing by the number of values is called ____________.

If the variance of the "number of daily parking tickets issued" is 100, the variance is defined as

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Index Numbers

Time Series and Forecasting

Nonparametric Methods: Goodness-Of-Fit Tests

Nonparametric Methods: Analysis of Ranked Data

Statistical Process Control and Quality Management

An Introduction to Decision Theory

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