Question 1

Nicole has created a table that summarizes the number of times a particular value of a variable occurs.Nicole has created a ____ distribution.

Accepted Answer

A)  parameter 
B)  normal 
C)  frequency 
D)  probability

Question 2

Population parameters are computed from sample data.

Accepted Answer

A) True 
 B)False

Question 3

If between 125 and 150 units of a product have been produced each day during the past month, the range of this production is 25 units.

Accepted Answer

A) True 
 B)False

Question 4

Suppose a population mean is assumed to be 20 and the sample standard deviation is 5.Then, a score of 15 would have a Z-value of approximately ____.

Accepted Answer

A)  -7.00 
B)  -1.00 
C)  +1.00 
D)  +5.00

Question 5

Which theorem states that as sample size increases, the distribution of sample means of size n, randomly selected, approaches a normal distribution?

Accepted Answer

A)  prospect 
B)  central-limit 
C)  dispersion 
D)  entropy

Question 6

____ is the percentage of elements that meet some criterion for membership in a category.

Accepted Answer

A)  Proportion 
B)  Central tendency 
C)  Estimation 
D)  Deviation

Question 7

Describe the measures of dispersion and explain why standard deviation is used most often.

Accepted Answer

The answer of Describe the measures of dispersion and explain...

Question 8

Name and describe the measures of central tendency.

Accepted Answer

The answer of Name and describe the measures of central...

Question 9

In a test marked study, 206 out of a sample of 560 people state that they "liked" the product being studied.The proportion of people in this study who said that they liked this product was about:

Accepted Answer

A)  .23 
B)  .37 
C)  .56 
D)  .71

Question 10

_____________ variables are those that the researcher should build into a survey that allow a comparison between sample units that do respond and those that do not respond.

Accepted Answer

The answer of _____________ variables are those that the researcher...

Question 11

Which of the following is the symbol for the population standard deviation?

Accepted Answer

A)  S 
B)  $\sigma$ 
C)  $\mu$ 
D)  S2

Question 12

Discuss confidence intervals

Accepted Answer

The answer of Discuss confidence intervals...

Question 13

A researcher must calculate the sample mean to calculate the confidence intervals.

Accepted Answer

A) True 
 B)False

Question 14

The confidence interval increases as the sample size, n, increases.

Accepted Answer

A) True 
 B)False

Question 15

The midpoint of a set of numbers is referred to as the _____.

Accepted Answer

A)  proportion 
B)  mode 
C)  mean 
D)  median

Question 16

When a researcher wants to estimate national market share based on the results of the test market for a new product in St.Louis and Kansas City, this is an example of:

Accepted Answer

A)  descriptive statistics 
B)  the central limit theorem 
C)  inferential statistics 
D)  the standardized normal distribution

Question 17

The range of numbers within which the population mean is expected to lie 95 percent of the time referred to as a(n)____________________ estimate.

Accepted Answer

The answer of The range of numbers within which the...

Question 18

The simplest measure of the dispersion of a set of scores is the ____________________.

Accepted Answer

The answer of The simplest measure of the dispersion of...

Question 19

The primary purpose of inferential statistics is to make a judgment about a population.

Accepted Answer

A) True 
 B)False

Question 20

A cross reference is an estimate of the population mean in the form of a single value.

Accepted Answer

A) True 
 B)False

Exam 13: Big Data Basics: Describing Samples and Populations

Nicole has created a table that summarizes the number of times a particular value of a variable occurs.Nicole has created a ____ distribution.

Population parameters are computed from sample data.

If between 125 and 150 units of a product have been produced each day during the past month, the range of this production is 25 units.

Suppose a population mean is assumed to be 20 and the sample standard deviation is 5.Then, a score of 15 would have a Z-value of approximately ____.

Which theorem states that as sample size increases, the distribution of sample means of size n, randomly selected, approaches a normal distribution?

____ is the percentage of elements that meet some criterion for membership in a category.

Describe the measures of dispersion and explain why standard deviation is used most often.

Name and describe the measures of central tendency.

In a test marked study, 206 out of a sample of 560 people state that they "liked" the product being studied.The proportion of people in this study who said that they liked this product was about:

_____________ variables are those that the researcher should build into a survey that allow a comparison between sample units that do respond and those that do not respond.

Which of the following is the symbol for the population standard deviation?

Discuss confidence intervals

A researcher must calculate the sample mean to calculate the confidence intervals.

The confidence interval increases as the sample size, n, increases.

The midpoint of a set of numbers is referred to as the _____.

When a researcher wants to estimate national market share based on the results of the test market for a new product in St.Louis and Kansas City, this is an example of:

The range of numbers within which the population mean is expected to lie 95 percent of the time referred to as a(n)____________________ estimate.

The simplest measure of the dispersion of a set of scores is the ____________________.

The primary purpose of inferential statistics is to make a judgment about a population.

A cross reference is an estimate of the population mean in the form of a single value.