Exam 2: Describing the Distribution of a Variable

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If a histogram of a data set is symmetric and bell shaped,with a mean of 75 and standard deviation of 10.Then,approximately 95% of the data values will be between 55 and 95.

(True/False)

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Question 61

A data set is typically a rectangular array of data,with observations in columns and variables in rows.

(True/False)

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Question 62

The average score for a class of 30 students was 75.The 20 male students in the class averaged 70.The average score of the 10 female students in the class is _____ the males.

(Multiple Choice)

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Question 63

A distribution with a high kurtosis has almost all of its observations within three standard deviations of the mean.

(True/False)

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Question 64

The median is one of the most frequently used measures of variability.

(True/False)

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Question 65

A histogram is based on binning the variable,which means putting the values of the numeric variable into discrete categories.

(True/False)

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Question 66

Categorical variables can be classified as either discrete or continuous.

(True/False)

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Question 67

Without performing any calculations,which of the following data sets has the greatest sample standard deviation?

(Multiple Choice)

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Question 68

All nominal data may be treated as ordinal data.

(True/False)

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Question 69

What are the three most common measures of central tendency?

(Multiple Choice)

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Question 70

The difference between the first and third quartile is called the

(Multiple Choice)

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Question 71

An operations management professor is interested in how her students performed on her midterm exam.The histogram shown below represents the distribution of exam scores (where the maximum score is 100)for 50 students. Based on this histogram,how would you characterize the students' performance on this exam?

(Essay)

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Question 72

Which of the states listed paid their teachers average salaries that exceed at least 75% of all average salaries?

(Essay)

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Question 73

Showing 61 - 73 of 73

If a histogram of a data set is symmetric and bell shaped,with a mean of 75 and standard deviation of 10.Then,approximately 95% of the data values will be between 55 and 95.

A data set is typically a rectangular array of data,with observations in columns and variables in rows.

The average score for a class of 30 students was 75.The 20 male students in the class averaged 70.The average score of the 10 female students in the class is _____ the males.

A distribution with a high kurtosis has almost all of its observations within three standard deviations of the mean.

The median is one of the most frequently used measures of variability.

A histogram is based on binning the variable,which means putting the values of the numeric variable into discrete categories.

Categorical variables can be classified as either discrete or continuous.

Without performing any calculations,which of the following data sets has the greatest sample standard deviation?

All nominal data may be treated as ordinal data.

What are the three most common measures of central tendency?

The difference between the first and third quartile is called the

Which of the states listed paid their teachers average salaries that exceed at least 75% of all average salaries?

Introduction to Business Analytics

Finding Relationships Among Variables

Business Intelligence Bifor Data Analysis

Probability and Probability Distributions

Decision Making Under Uncertainty

Sampling and Sampling Distributions

Confidence Interval Estimation

Hypothesis Testing

Regression Analysis: Estimating Relationships

Regression Analysis: Statistical Inference

Time Series Analysis and Forecasting

Introduction to Optimization Modeling

Optimization Models

Introduction to Simulation Modeling

Simulation Models

Data Mining

Analysis of Variance and Experimental Design

Statistical Process Control

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