Question 1

If s = 10 and n = 100, we would expect that 68% of sample means would fall between ______.

Accepted Answer

A)  ±1 
B)  ±0.1 
C)  ±2 
D)  ±0.2 
A)  ±1 
B)  ±0.1 
C)  ±2 
D)  ±0.2

Question 2

Sampling error occurs because ______.

Accepted Answer

A)  the researcher made a mistake 
B)  the researcher chose an inappropriate sample 
C)  of chance factors 
D)  of a poorly designed study 
A)  the researcher made a mistake 
B)  the researcher chose an inappropriate sample 
C)  of chance factors 
D)  of a poorly designed study

Question 3

You are more likely to draw an accurate conclusion when n = 20 than when n = 100.

Accepted Answer

A) True 
 B)False

Question 4

If you used simple random sampling to select n = 2 when N = 10, the first selected subject has a ______ chance of being selected.

Accepted Answer

A)  10% 
B)  20% 
C)  50% 
D)  none of these 
A)  10% 
B)  20% 
C)  50% 
D)  none of these

Question 5

If you randomly select five subjects from a population, you are sampling.

Accepted Answer

A) True 
 B)False

Question 6

If you change the size of the sample ______.

Accepted Answer

A)  the standard error will change 
B)  the sampling distribution will change 
C)  n will change 
D)  all of these 
A)  the standard error will change 
B)  the sampling distribution will change 
C)  n will change 
D)  all of these

Question 7

You should use the sample estimate of the standard error instead of the population standard error when ______.

Accepted Answer

A)  the sample standard deviation is easier to calculate than the population standard deviation 
B)  the sample standard deviation is unknown 
C)  the population standard deviation is unknown 
D)  any time; they are the same 
A)  the sample standard deviation is easier to calculate than the population standard deviation 
B)  the sample standard deviation is unknown 
C)  the population standard deviation is unknown 
D)  any time; they are the same

Question 8

Sampling error exists with only some types of statistics.

Accepted Answer

A) True 
 B)False

Question 9

Increasing sample size will guarantee a more representative sample of the population.

Accepted Answer

A) True 
 B)False

Question 10

A gumball machine contains three colours of gumballs. There are 10 red gumballs, 10 blue gumballs, and 20 white gumballs. If you take a random sample of four gumballs from the machine and three are white, what is the probability that the fourth will be blue?

Accepted Answer

A)  .25 
B)  .50 
C)  .75 
D)  none of these 
A)  .25 
B)  .50 
C)  .75 
D)  none of these

Question 11

You want to ensure that the composition of your sample of employees has the same balance of men and women that your organization has. Your organization is 60% women and 40% men. If you need 100 responses to your surveys, how many women are in your population?

Accepted Answer

A)  40 
B)  60 
C)  100 
D)  none of these 
A)  40 
B)  60 
C)  100 
D)  none of these

Question 12

If n = 25 and s2 = 16, the sample estimate of the standard error is ______.

Accepted Answer

A)  0.80 
B)  0.64 
C)  0.31 
D)  0.16 
A)  0.80 
B)  0.64 
C)  0.31 
D)  0.16

Question 13

If you randomly select a sample of n = 50 and a sample of n = 100 from the sample population, which one would you assume to be more representative of the population?

Accepted Answer

A)  n = 50 
B)  n = 100 
C)  neither; they are equally accurate 
D)  none of these 
A)  n = 50 
B)  n = 100 
C)  neither; they are equally accurate 
D)  none of these

Question 14

Consider the sample collected for the survey variable below for Questions.
 $\begin{array}{l}

\begin{array}{|c|}
\hline\text { Survey }\
\hline 2 \
\hline 3 \
\hline 3 \
\hline 4 \
\hline 2 \
\hline 4 \
\hline 3 \
\hline 3 \
\hline 3 \
\hline 4 \
\hline
\end{array}
\end{array}$
-What is the standard deviation of the survey variable?

Accepted Answer

The answer of Consider the sample collected for the survey...

Question 15

If you had 5 total employees, how many different draws of 3 employees are possible from this population when drawing random samples?

Accepted Answer

A)  15 
B)  45 
C)  60 
D)  none of these 
A)  15 
B)  45 
C)  60 
D)  none of these

Question 16

The sample mean estimates the population mean.

Accepted Answer

A) True 
 B)False

If s = 10 and n = 100, we would expect that 68% of sample means would fall between ______.

Sampling error occurs because ______.

You are more likely to draw an accurate conclusion when n = 20 than when n = 100.

If you used simple random sampling to select n = 2 when N = 10, the first selected subject has a ______ chance of being selected.

If you randomly select five subjects from a population, you are sampling.

If you change the size of the sample ______.

You should use the sample estimate of the standard error instead of the population standard error when ______.

Sampling error exists with only some types of statistics.

Increasing sample size will guarantee a more representative sample of the population.

A gumball machine contains three colours of gumballs. There are 10 red gumballs, 10 blue gumballs, and 20 white gumballs. If you take a random sample of four gumballs from the machine and three are white, what is the probability that the fourth will be blue?

You want to ensure that the composition of your sample of employees has the same balance of men and women that your organization has. Your organization is 60% women and 40% men. If you need 100 responses to your surveys, how many women are in your population?

If n = 25 and s² = 16, the sample estimate of the standard error is ______.

If you randomly select a sample of n = 50 and a sample of n = 100 from the sample population, which one would you assume to be more representative of the population?

Consider the sample collected for the survey variable below for Questions. Survey 2 3 3 4 2 4 3 3 3 4 -What is the standard deviation of the survey variable?

If you had 5 total employees, how many different draws of 3 employees are possible from this population when drawing random samples?

The sample mean estimates the population mean.

The Language of Statistics

Working With Numbers and Data Display

Central Tendency and Variability

Probability Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Tests for Significance: Paired and Independent-Samples T-Test

Analysis of Variance Anova

CHI-Squared Tests of Fit

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

Exam 5: Sampling Distributions

If s = 10 and n = 100, we would expect that 68% of sample means would fall between ______.

Sampling error occurs because ______.

You are more likely to draw an accurate conclusion when n = 20 than when n = 100.

If you used simple random sampling to select n = 2 when N = 10, the first selected subject has a ______ chance of being selected.

If you randomly select five subjects from a population, you are sampling.

If you change the size of the sample ______.

You should use the sample estimate of the standard error instead of the population standard error when ______.

Sampling error exists with only some types of statistics.

Increasing sample size will guarantee a more representative sample of the population.

A gumball machine contains three colours of gumballs. There are 10 red gumballs, 10 blue gumballs, and 20 white gumballs. If you take a random sample of four gumballs from the machine and three are white, what is the probability that the fourth will be blue?

You want to ensure that the composition of your sample of employees has the same balance of men and women that your organization has. Your organization is 60% women and 40% men. If you need 100 responses to your surveys, how many women are in your population?

If n = 25 and s2 = 16, the sample estimate of the standard error is ______.

If you randomly select a sample of n = 50 and a sample of n = 100 from the sample population, which one would you assume to be more representative of the population?

Consider the sample collected for the survey variable below for Questions. Survey 2 3 3 4 2 4 3 3 3 4 -What is the standard deviation of the survey variable?

If you had 5 total employees, how many different draws of 3 employees are possible from this population when drawing random samples?

The sample mean estimates the population mean.

The Language of Statistics

Working With Numbers and Data Display

Central Tendency and Variability

Probability Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Tests for Significance: Paired and Independent-Samples T-Test

Analysis of Variance Anova

CHI-Squared Tests of Fit

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

If n = 25 and s² = 16, the sample estimate of the standard error is ______.