Question 1

If the sample size goes up,the confidence level becomes less precise.

Accepted Answer

A) True 
 B)False

Question 2

SELECT ALL THAT APPLY.
-Confidence level

Accepted Answer

A) is the range of values within which the population parameter is estimated to fall. 
B) is the likelihood that a specified interval will contain the population parameter. 
C) can be expressed as a percentage. 
D) can be expressed as a probability. 
A) is the range of values within which the population parameter is estimated to fall. 
B) is the likelihood that a specified interval will contain the population parameter. 
C) can be expressed as a percentage. 
D) can be expressed as a probability.

Question 3

A process whereby we select a random sample from a population and use a sample statistic to estimate a population parameter is known as a point estimate.

Accepted Answer

A) True 
 B)False

Question 4

The formula $ \bar{Y} \pm Z\left(\sigma_{Y}\right) $ is used to estimate the

Accepted Answer

A) mean. 
B) standard error. 
C) Z score. 
D) confidence interval for mean. 
A) mean. 
B) standard error. 
C) Z score. 
D) confidence interval for mean.

Question 5

Suppose that a researcher calculated a 95% confidence interval of (36.56,41.52).Provide a one or two sentence interpretation of this result.

Accepted Answer

We can be 95% confid

Question 6

SELECT ALL THAT APPLY.
-Margin of error

Accepted Answer

A) refers to confidence intervals. 
B) is equal to standard error of the mean. 
C) is equal to standard error of the proportion. 
D) is the radius of confidence intervals. 
A) refers to confidence intervals. 
B) is equal to standard error of the mean. 
C) is equal to standard error of the proportion. 
D) is the radius of confidence intervals.

Question 7

In a survey sample of 83 respondents,the mean number of hours worked per week is 39.04,with a standard deviation of 11.51.Calculate a 95% confidence interval for these data.

Accepted Answer

The answer of In a survey sample of 83 respondents,the...

Question 8

Assuming that a sample (N = 504)has a sample standard deviation of 2.26,what is the upper bound of a 95% confidence interval if the sample mean is 2.96?

Accepted Answer

A) 2.76 
B) 2.96 
C) 3.16 
D) 5.94 
A) 2.76 
B) 2.96 
C) 3.16 
D) 5.94

Question 9

In a survey sample of 83 respondents,about 30.1 percent of the sample work less than 40 hours per week.What is the estimated standard error for the group of respondents who work 40 hours or more per week?

Accepted Answer

The answer of In a survey sample of 83 respondents,about...

Question 10

SELECT ALL THAT APPLY.
-If a 95% confidence level is selected,then

Accepted Answer

A) the corresponding Z score is 2.58. 
B) the probability of a selected sample falling in this interval is 0.95. 
C) there is a 5% chance of the interval being incorrect. 
D) 5 chances out of 100 will fall in the interval. 
A) the corresponding Z score is 2.58. 
B) the probability of a selected sample falling in this interval is 0.95. 
C) there is a 5% chance of the interval being incorrect. 
D) 5 chances out of 100 will fall in the interval.

Question 11

A sample of 150 U.S.adults is composed of 100 women and 50 men.Estimate the confidence interval for the male population with 99% confidence.

Accepted Answer

The answer of A sample of 150 U.S.adults is composed...

Question 12

Where is the most common application of estimation using confidence intervals usually found?

Accepted Answer

A) Statistics textbooks 
B) Scholarly journals 
C) Opinion polls 
D) GSS data 
A) Statistics textbooks 
B) Scholarly journals 
C) Opinion polls 
D) GSS data

Question 13

If the value of the sample standard deviation goes up,the confidence level becomes more precise.

Accepted Answer

A) True 
 B)False

Question 14

A sample of 150 U.S.adults is composed of 100 women and 50 men.Estimate the confidence interval for the female population with 99% confidence.

Accepted Answer

The answer of A sample of 150 U.S.adults is composed...

Question 15

SELECT ALL THAT APPLY.
-Information on the population can be drawn from

Accepted Answer

A) sample mean. 
B) sample size. 
C) sample standard deviation. 
D) number of subgroups in the population. 
A) sample mean. 
B) sample size. 
C) sample standard deviation. 
D) number of subgroups in the population.

Question 16

Which of the following examples illustrates estimation?

Accepted Answer

A) The actual percentage of unemployed Americans 
B) The varying valid percentages of Republicans and Democrats who closely follow controversial political news 
C) The actual average level of education in the United States 
D) The percentage of Americans who favor gay and lesbian relations as approximated by the Gallup organization 
A) The actual percentage of unemployed Americans 
B) The varying valid percentages of Republicans and Democrats who closely follow controversial political news 
C) The actual average level of education in the United States 
D) The percentage of Americans who favor gay and lesbian relations as approximated by the Gallup organization

Question 17

The likelihood that a specified interval will contain the population parameter is referred to as

Accepted Answer

A) an upper bound. 
B) a lower bound. 
C) the confidence level. 
D) the margin of error. 
A) an upper bound. 
B) a lower bound. 
C) the confidence level. 
D) the margin of error.

Question 18

When p > 0.50,a larger sample is required to meet the assumptions of normality.

Accepted Answer

A) True 
 B)False

Question 19

In a survey sample of 83 respondents,about 30.1 percent of the sample work less than 40 hours per week.What is the estimated standard error of the proportion for this group?

Accepted Answer

The answer of In a survey sample of 83 respondents,about...

Question 20

The standard error of the proportion .35 with sample N = 1700 is .001.

Accepted Answer

A) True 
 B)False

If the sample size goes up,the confidence level becomes less precise.

SELECT ALL THAT APPLY. -Confidence level

A process whereby we select a random sample from a population and use a sample statistic to estimate a population parameter is known as a point estimate.

The formula $\bar{Y} \pm Z\left(\sigma_{Y}\right)$ is used to estimate the

Suppose that a researcher calculated a 95% confidence interval of (36.56,41.52).Provide a one or two sentence interpretation of this result.

SELECT ALL THAT APPLY. -Margin of error

In a survey sample of 83 respondents,the mean number of hours worked per week is 39.04,with a standard deviation of 11.51.Calculate a 95% confidence interval for these data.

Assuming that a sample (N = 504)has a sample standard deviation of 2.26,what is the upper bound of a 95% confidence interval if the sample mean is 2.96?

In a survey sample of 83 respondents,about 30.1 percent of the sample work less than 40 hours per week.What is the estimated standard error for the group of respondents who work 40 hours or more per week?

SELECT ALL THAT APPLY. -If a 95% confidence level is selected,then

A sample of 150 U.S.adults is composed of 100 women and 50 men.Estimate the confidence interval for the male population with 99% confidence.

Where is the most common application of estimation using confidence intervals usually found?

If the value of the sample standard deviation goes up,the confidence level becomes more precise.

A sample of 150 U.S.adults is composed of 100 women and 50 men.Estimate the confidence interval for the female population with 99% confidence.

SELECT ALL THAT APPLY. -Information on the population can be drawn from

Which of the following examples illustrates estimation?

The likelihood that a specified interval will contain the population parameter is referred to as

When p > 0.50,a larger sample is required to meet the assumptions of normality.

In a survey sample of 83 respondents,about 30.1 percent of the sample work less than 40 hours per week.What is the estimated standard error of the proportion for this group?

The standard error of the proportion .35 with sample N = 1700 is .001.

The What and the Why of Statistics

The Organization and Graphic Presentation of Data

Measures of Central Tendency

Measures of Variability

The Normal Distribution

Sampling and Sampling Distributions

Testing Hypotheses

Bivariate Tables

The Chi-Square Test and Measures of Association

Analysis of Variance

Regression and Correlation

Filters

Exam 7: Estimation

If the sample size goes up,the confidence level becomes less precise.

SELECT ALL THAT APPLY. -Confidence level

A process whereby we select a random sample from a population and use a sample statistic to estimate a population parameter is known as a point estimate.

The formula Yˉ±Z(σY) \bar{Y} \pm Z\left(\sigma_{Y}\right) Yˉ±Z(σY​) is used to estimate the

Suppose that a researcher calculated a 95% confidence interval of (36.56,41.52).Provide a one or two sentence interpretation of this result.

SELECT ALL THAT APPLY. -Margin of error

In a survey sample of 83 respondents,the mean number of hours worked per week is 39.04,with a standard deviation of 11.51.Calculate a 95% confidence interval for these data.

Assuming that a sample (N = 504)has a sample standard deviation of 2.26,what is the upper bound of a 95% confidence interval if the sample mean is 2.96?

In a survey sample of 83 respondents,about 30.1 percent of the sample work less than 40 hours per week.What is the estimated standard error for the group of respondents who work 40 hours or more per week?

SELECT ALL THAT APPLY. -If a 95% confidence level is selected,then

A sample of 150 U.S.adults is composed of 100 women and 50 men.Estimate the confidence interval for the male population with 99% confidence.

Where is the most common application of estimation using confidence intervals usually found?

If the value of the sample standard deviation goes up,the confidence level becomes more precise.

A sample of 150 U.S.adults is composed of 100 women and 50 men.Estimate the confidence interval for the female population with 99% confidence.

SELECT ALL THAT APPLY. -Information on the population can be drawn from

Which of the following examples illustrates estimation?

The likelihood that a specified interval will contain the population parameter is referred to as

When p > 0.50,a larger sample is required to meet the assumptions of normality.

In a survey sample of 83 respondents,about 30.1 percent of the sample work less than 40 hours per week.What is the estimated standard error of the proportion for this group?

The standard error of the proportion .35 with sample N = 1700 is .001.

The What and the Why of Statistics

The Organization and Graphic Presentation of Data

Measures of Central Tendency

Measures of Variability

The Normal Distribution

Sampling and Sampling Distributions

Testing Hypotheses

Bivariate Tables

The Chi-Square Test and Measures of Association

Analysis of Variance

Regression and Correlation

Filters

The formula $\bar{Y} \pm Z\left(\sigma_{Y}\right)$ is used to estimate the