Question 1

Because there is always a chance that an EPSEM sample might not be representative,alpha cannot be

Accepted Answer

A) known. 
B) 1.00. 
C) 0.00. 
D) less than .10. 
A) known. 
B) 1.00. 
C) 0.00. 
D) less than .10. C

Question 2

A random sample of 500 reports an average yearly income of $42,000 with a standard deviation of $1000.An estimate of the parameter at the 95% level is about $175 wide.In this research situation,

Accepted Answer

A) the parameter is $42,000. 
B) the sample is unrepresentative. 
C) the alpha level is 0.05. 
D) the sample mean is $175. 
A) the parameter is $42,000. 
B) the sample is unrepresentative. 
C) the alpha level is 0.05. 
D) the sample mean is $175. C

Question 3

The sizes of four samples vary as follows:
Sample A,N = 100
Sample B,N = 76
Sample C,N = 1000
Sample D,N = 150
Which sample will produce the most efficient estimate?

Accepted Answer

A) Sample A 
B) Sample B 
C) Sample C 
D) Sample D 
A) Sample A 
B) Sample B 
C) Sample C 
D) Sample D C

Question 4

The width of an interval estimate can be controlled by

Accepted Answer

A) changing the confidence level. 
B) changing the alpha level. 
C) changing the sample size. 
D) any of the above 
A) changing the confidence level. 
B) changing the alpha level. 
C) changing the sample size. 
D) any of the above

Question 5

To construct the narrowest possible confidence intervals,use ____.

Accepted Answer

A) small samples 
B) large samples 
C) the least efficient estimator 
D) an unbiased statistic 
A) small samples 
B) large samples 
C) the least efficient estimator 
D) an unbiased statistic

Question 6

If a researcher changes from the 90% confidence level to the 95% level,the confidence interval will

Accepted Answer

A) widen. 
B) decrease in width. 
C) not be affected. 
D) widen only if N is greater than 100. 
A) widen. 
B) decrease in width. 
C) not be affected. 
D) widen only if N is greater than 100.

Question 7

In estimation procedures,____ are estimated based on the value of ____.

Accepted Answer

A) statistics,parameters 
B) parameters,statistics 
C) values,frequencies 
D) sample,populations 
A) statistics,parameters 
B) parameters,statistics 
C) values,frequencies 
D) sample,populations

Question 8

Based on an EPSEM sample of 300 state university students,we estimate that the average number of hours of study time each week is 30$\pm$ 2.In this example,the population is

Accepted Answer

A) the 300 state university students. 
B) all state university students. 
C) unknown. 
D) the same as the parameter. 
A) the 300 state university students. 
B) all state university students. 
C) unknown. 
D) the same as the parameter.

Question 9

A random sample of 200 includes 100 Protestants.The researcher estimates,at the 95% confidence level,that between 43% and 57% of the population is Protestant.In this research situation,

Accepted Answer

A) alpha is .10. 
B) Pu is 95. 
C) N is 100. 
D) Ps is .50. 
A) alpha is .10. 
B) Pu is 95. 
C) N is 100. 
D) Ps is .50.

Question 10

Wider confidence intervals

Accepted Answer

A) are sure to include the population value. 
B) are less likely to include the population value. 
C) are more likely to include the population value. 
D) do not alter the chance of including the population value. 
A) are sure to include the population value. 
B) are less likely to include the population value. 
C) are more likely to include the population value. 
D) do not alter the chance of including the population value.

Question 11

The larger the sample size (N),the

Accepted Answer

A) smaller the parameter. 
B) greater the efficiency. 
C) lower the bias. 
D) larger the standard error of the mean. 
A) smaller the parameter. 
B) greater the efficiency. 
C) lower the bias. 
D) larger the standard error of the mean.

Question 12

Two sample statistics are unbiased estimators.They are

Accepted Answer

A) means and proportions. 
B) means and standard deviations. 
C) medians and modes. 
D) proportions and percentages. 
A) means and proportions. 
B) means and standard deviations. 
C) medians and modes. 
D) proportions and percentages.

Question 13

In constructing interval estimates based on sample proportions (Ps),the population proportion (Pu)must be estimated.It is most conservative to estimate Pu at

Accepted Answer

A) Ps. 
B) .50. 
C) .25. 
D) 1.00. 
A) Ps. 
B) .50. 
C) .25. 
D) 1.00.

Question 14

We can estimate the probability that sample means and proportions lie within a given distance of the population value because these statistics are

Accepted Answer

A) unbiased. 
B) efficient. 
C) random. 
D) biaseD. 
A) unbiased. 
B) efficient. 
C) random. 
D) biaseD.

Question 15

In estimation procedures,the alpha level is

Accepted Answer

A) the same as the confidence level. 
B) the parameter we are trying to estimate. 
C) always greater than the standard error. 
D) equal to the efficiency ratio minus the bias coefficient. 
A) the same as the confidence level. 
B) the parameter we are trying to estimate. 
C) always greater than the standard error. 
D) equal to the efficiency ratio minus the bias coefficient.

Question 16

Public opinion polls and election projections are examples of

Accepted Answer

A) estimation procedures. 
B) hypothesis testing. 
C) non-statistical research methods. 
D) blatant misuse of statistical procedures. 
A) estimation procedures. 
B) hypothesis testing. 
C) non-statistical research methods. 
D) blatant misuse of statistical procedures.

Question 17

The sample standard deviation is a biased estimator of the population standard deviation.When using sample means as estimators,we correct for bias in the formula for finding confidence intervals by

Accepted Answer

A) using N - 1 rather than N. 
B) using N rather than N - 1. 
C) using s rather than Z. 
D) squaring the value of Z. 
A) using N - 1 rather than N. 
B) using N rather than N - 1. 
C) using s rather than Z. 
D) squaring the value of Z.

Question 18

The more efficient the estimate,the more the sampling distribution

Accepted Answer

A) is evenly spread from the mean to$\pm$2 standard deviations. 
B) becomes flatter. 
C) clusters to the right of the mean. 
D) is clustered around the mean. 
A) is evenly spread from the mean to$\pm$2 standard deviations. 
B) becomes flatter. 
C) clusters to the right of the mean. 
D) is clustered around the mean.

Question 19

A random sample of 200 includes 100 Protestants.The researcher estimates,at the 95% confidence level,that between 43% and 57% of the population is Protestant.In this research situation,

Accepted Answer

A) the parameter is 200. 
B) Pu is .43 or .57. 
C) N is 100. 
D) alpha is 0.05. 
A) the parameter is 200. 
B) Pu is .43 or .57. 
C) N is 100. 
D) alpha is 0.05.

Question 20

In the formulas for constructing interval estimates based on sample proportions,the expression Pu (l - Pu)has a maximum value of

Accepted Answer

A) .50. 
B) .25. 
C) 1.00. 
D) .75. 
A) .50. 
B) .25. 
C) 1.00. 
D) .75.

Because there is always a chance that an EPSEM sample might not be representative,alpha cannot be

A random sample of 500 reports an average yearly income of $42,000 with a standard deviation of $1000.An estimate of the parameter at the 95% level is about $175 wide.In this research situation,

The sizes of four samples vary as follows: Sample A,N = 100 Sample B,N = 76 Sample C,N = 1000 Sample D,N = 150 Which sample will produce the most efficient estimate?

The width of an interval estimate can be controlled by

To construct the narrowest possible confidence intervals,use ____.

If a researcher changes from the 90% confidence level to the 95% level,the confidence interval will

In estimation procedures, are estimated based on the value of .

Based on an EPSEM sample of 300 state university students,we estimate that the average number of hours of study time each week is 30 $\pm$ 2.In this example,the population is

A random sample of 200 includes 100 Protestants.The researcher estimates,at the 95% confidence level,that between 43% and 57% of the population is Protestant.In this research situation,

Wider confidence intervals

The larger the sample size (N),the

Two sample statistics are unbiased estimators.They are

In constructing interval estimates based on sample proportions (P_s),the population proportion (P_u)must be estimated.It is most conservative to estimate P_u at

We can estimate the probability that sample means and proportions lie within a given distance of the population value because these statistics are

In estimation procedures,the alpha level is

Public opinion polls and election projections are examples of

The sample standard deviation is a biased estimator of the population standard deviation.When using sample means as estimators,we correct for bias in the formula for finding confidence intervals by

The more efficient the estimate,the more the sampling distribution

A random sample of 200 includes 100 Protestants.The researcher estimates,at the 95% confidence level,that between 43% and 57% of the population is Protestant.In this research situation,

In the formulas for constructing interval estimates based on sample proportions,the expression P_u (l - P_u)has a maximum value of

Introduction

Basic Descriptive Statistics: Percentages, Ratios and Rates, Tables, Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction to Inferential Statistics: Sampling and the Sampling Distribution

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Bivariate Association: Introduction and Basic Concepts

Association Between Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 7: Estimation Procedures

Because there is always a chance that an EPSEM sample might not be representative,alpha cannot be

A random sample of 500 reports an average yearly income of $42,000 with a standard deviation of $1000.An estimate of the parameter at the 95% level is about $175 wide.In this research situation,

The sizes of four samples vary as follows: Sample A,N = 100 Sample B,N = 76 Sample C,N = 1000 Sample D,N = 150 Which sample will produce the most efficient estimate?

The width of an interval estimate can be controlled by

To construct the narrowest possible confidence intervals,use ____.

If a researcher changes from the 90% confidence level to the 95% level,the confidence interval will

In estimation procedures,____ are estimated based on the value of ____.

Based on an EPSEM sample of 300 state university students,we estimate that the average number of hours of study time each week is 30 ±\pm± 2.In this example,the population is

A random sample of 200 includes 100 Protestants.The researcher estimates,at the 95% confidence level,that between 43% and 57% of the population is Protestant.In this research situation,

Wider confidence intervals

The larger the sample size (N),the

Two sample statistics are unbiased estimators.They are

In constructing interval estimates based on sample proportions (Ps),the population proportion (Pu)must be estimated.It is most conservative to estimate Pu at

We can estimate the probability that sample means and proportions lie within a given distance of the population value because these statistics are

In estimation procedures,the alpha level is

Public opinion polls and election projections are examples of

The sample standard deviation is a biased estimator of the population standard deviation.When using sample means as estimators,we correct for bias in the formula for finding confidence intervals by

The more efficient the estimate,the more the sampling distribution

A random sample of 200 includes 100 Protestants.The researcher estimates,at the 95% confidence level,that between 43% and 57% of the population is Protestant.In this research situation,

In the formulas for constructing interval estimates based on sample proportions,the expression Pu (l - Pu)has a maximum value of

Introduction

Basic Descriptive Statistics: Percentages, Ratios and Rates, Tables, Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction to Inferential Statistics: Sampling and the Sampling Distribution

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Bivariate Association: Introduction and Basic Concepts

Association Between Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

In estimation procedures, are estimated based on the value of .

Based on an EPSEM sample of 300 state university students,we estimate that the average number of hours of study time each week is 30 $\pm$ 2.In this example,the population is

In constructing interval estimates based on sample proportions (P_s),the population proportion (P_u)must be estimated.It is most conservative to estimate P_u at

In the formulas for constructing interval estimates based on sample proportions,the expression P_u (l - P_u)has a maximum value of