Question 1

The standard deviation of a sample:

Accepted Answer

A) is always smaller than the mean of the sample. 
B) is always greater than the mean of the sample. 
C) is always smaller than the variance of the sample. 
D) is always greater than the variance of the sample. 
E) none of the above. 
A) is always smaller than the mean of the sample. 
B) is always greater than the mean of the sample. 
C) is always smaller than the variance of the sample. 
D) is always greater than the variance of the sample. 
E) none of the above.

Question 2

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009).What is the mode of life expectancy in the eight countries?

Accepted Answer

A) 78 years 
B) 80 years 
C) 81 years 
D) 75 years 
E) 860 years 
A) 78 years 
B) 80 years 
C) 81 years 
D) 75 years 
E) 860 years

Question 3

Below is a table showing the number of cancelled flights for Alleghany Airlines over the past 25 days.If you were to construct a "less than or equal to" cumulative frequency table what value would you enter as the cumulative frequency associated with 3 cancellations?

Accepted Answer

A) 1 
B) 18 
C) 2 
D) 15 
E) 23 
A) 1 
B) 18 
C) 2 
D) 15 
E) 23

Question 4

On the horizontal axis of a bar chart, one places the frequency or the relative frequency (but only one).

Accepted Answer

A) True 
 B)False

Question 5

The waiting line of cars at In-N-Out Burger on Van Nuys Blvd.can get fairly long.In a recent study, you checked the length of the line 60 random times during one day.The table below shows the full set of results.Determine the "less than or equal to" cumulative relative frequency for an x value of 3 customers in line.

Accepted Answer

A) .467 
B) .950 
C) .233 
D) .883 
E) .767 
A) .467 
B) .950 
C) .233 
D) .883 
E) .767

Question 6

If a distribution has a shape that is positively skewed, this means that it has an elongated tail that extends in the right-hand direction.

Accepted Answer

A) True 
 B)False

Question 7

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the variance of the number of openings data.Treat the data as a population.

Accepted Answer

A) 1.71 
B) 1.15 
C) 2.58 
D) 1.09 
E) 2.76 
A) 1.71 
B) 1.15 
C) 2.58 
D) 1.09 
E) 2.76

The standard deviation of a sample:

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009).What is the mode of life expectancy in the eight countries?

Below is a table showing the number of cancelled flights for Alleghany Airlines over the past 25 days.If you were to construct a "less than or equal to" cumulative frequency table what value would you enter as the cumulative frequency associated with 3 cancellations?

On the horizontal axis of a bar chart, one places the frequency or the relative frequency (but only one).

If a distribution has a shape that is positively skewed, this means that it has an elongated tail that extends in the right-hand direction.

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the variance of the number of openings data.Treat the data as a population.

An Introduction to Statistics

Descriptive Statistics II: Additional Descriptive Measures and Data Displays

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Statistical Inference: Estimating a Population Mean

Interval Estimates for Proportions, Mean Differences and Proportion Differences

Statistical Hypothesis Testing: Hypothesis Tests for a Population Mean

Hypothesis Tests for Proportions, Mean Differences and Proportion Differences

Basic Regression Analysis

Multiple Regression

F Tests and Analysis of Variance

Experimental Designonline Only

Chi-Square Tests

Filters

Exam 2: Descriptive Statistics I: Elementary Data Presentation and Description

The standard deviation of a sample:

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009).What is the mode of life expectancy in the eight countries?

Below is a table showing the number of cancelled flights for Alleghany Airlines over the past 25 days.If you were to construct a "less than or equal to" cumulative frequency table what value would you enter as the cumulative frequency associated with 3 cancellations?

On the horizontal axis of a bar chart, one places the frequency or the relative frequency (but only one).

If a distribution has a shape that is positively skewed, this means that it has an elongated tail that extends in the right-hand direction.

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the variance of the number of openings data.Treat the data as a population.

An Introduction to Statistics

Descriptive Statistics II: Additional Descriptive Measures and Data Displays

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Statistical Inference: Estimating a Population Mean

Interval Estimates for Proportions, Mean Differences and Proportion Differences

Statistical Hypothesis Testing: Hypothesis Tests for a Population Mean

Hypothesis Tests for Proportions, Mean Differences and Proportion Differences

Basic Regression Analysis

Multiple Regression

F Tests and Analysis of Variance

Experimental Designonline Only

Chi-Square Tests

Filters