Question 1

A researcher has collected the following sample data.The mean of the sample is 5.   The standard deviation is

Accepted Answer

A)  1.10. 
B)  1.2. 
C)  1.22. 
D)  1.5. 
A)  1.10. 
B)  1.2. 
C)  1.22. 
D)  1.5.

Question 2

The 75th percentile is referred to as the _____ quartile.

Accepted Answer

A)  first 
B)  second 
C)  third 
D)  fourth 
A)  first 
B)  second 
C)  third 
D)  fourth

Question 3

Which of the following provides a measure of central tendency for the data?

Accepted Answer

A)  Standard deviation 
B)  Mean 
C)  Variance 
D)  Range 
A)  Standard deviation 
B)  Mean 
C)  Variance 
D)  Range

Question 4

The variance can never be

Accepted Answer

A)  the same as the standard deviation. 
B)  larger than the standard deviation. 
C)  negative. 
D)  smaller than the standard deviation. 
A)  the same as the standard deviation. 
B)  larger than the standard deviation. 
C)  negative. 
D)  smaller than the standard deviation.

Question 5

In the last month, Nancy purchased gasoline from four different gas stations.The following table shows the price per gallon and the gallons of gasoline that she purchased.   Determine the average price per gallon that Nancy paid for the gasoline.

Accepted Answer

The answer of In the last month, Nancy purchased gasoline...

Question 6

The median of a sample will always equal the

Accepted Answer

A)  (Q1 + Q3)/2. 
B)  square root of the variance. 
C)  50th percentile. 
D)  (smallest value + largest value)/2. 
A)  (Q1 + Q3)/2. 
B)  square root of the variance. 
C)  50th percentile. 
D)  (smallest value + largest value)/2.

Question 7

The price of a selected stock over a five day period is shown below.
​
47, 45, 43, 47, 46
​
Using the above data, compute the mean, the median, and the mode.

Accepted Answer

Mean = 45.

A researcher has collected the following sample data.The mean of the sample is 5. The standard deviation is

The 75th percentile is referred to as the _____ quartile.

Which of the following provides a measure of central tendency for the data?

The variance can never be

In the last month, Nancy purchased gasoline from four different gas stations.The following table shows the price per gallon and the gallons of gasoline that she purchased. Determine the average price per gallon that Nancy paid for the gasoline.

The median of a sample will always equal the

The price of a selected stock over a five day period is shown below. 47, 45, 43, 47, 46 Using the above data, compute the mean, the median, and the mode.

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Exam 3: Descriptive Statistics: Numerical Measures

A researcher has collected the following sample data.The mean of the sample is 5. The standard deviation is

The 75th percentile is referred to as the _____ quartile.

Which of the following provides a measure of central tendency for the data?

The variance can never be

In the last month, Nancy purchased gasoline from four different gas stations.The following table shows the price per gallon and the gallons of gasoline that she purchased. Determine the average price per gallon that Nancy paid for the gasoline.

The median of a sample will always equal the

The price of a selected stock over a five day period is shown below. ​ 47, 45, 43, 47, 46 ​ Using the above data, compute the mean, the median, and the mode.

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

The price of a selected stock over a five day period is shown below. 47, 45, 43, 47, 46 Using the above data, compute the mean, the median, and the mode.