Question 1

The probability that an interval estimate does not include the population value is called

Accepted Answer

A) the margin. 
B) alpha. 
C) an error. 
D) the odds. 
A) the margin. 
B) alpha. 
C) an error. 
D) the odds.

Question 2

Which sample size will produce the confidence interval with the smallest width?

Accepted Answer

A) 100 
B) 200 
C) 500 
D) 1000 
A) 100 
B) 200 
C) 500 
D) 1000

Question 3

Polls tracking the popularity of President Bush show

Accepted Answer

A) dramatic increases in support following both the terrorist attacks of 9-11 and the invasion of Iraq. 
B) a dramatic increase in support following 9-11 but no particular change after the invasion of Iraq. 
C) a remarkable consistency in popularity that never exceeded 55% and never fell below 50%. 
D) low levels of support that have often fallen below 25% approval. 
A) dramatic increases in support following both the terrorist attacks of 9-11 and the invasion of Iraq. 
B) a dramatic increase in support following 9-11 but no particular change after the invasion of Iraq. 
C) a remarkable consistency in popularity that never exceeded 55% and never fell below 50%. 
D) low levels of support that have often fallen below 25% approval.

Question 4

As our confidence in an interval estimate increases,the width of the interval

Accepted Answer

A) decreases. 
B) increases. 
C) remains the same. 
D) increases or decreases depending on the alpha level. 
A) decreases. 
B) increases. 
C) remains the same. 
D) increases or decreases depending on the alpha level.

Question 5

The most commonly used confidence level is

Accepted Answer

A) 99.5%. 
B) 95%. 
C) 90.5%. 
D) 90%. 
A) 99.5%. 
B) 95%. 
C) 90.5%. 
D) 90%.

Question 6

In estimation procedures,the Z score that corresponds to an alpha of .05 is

Accepted Answer

A) $\pm$1.96. 
B) $\pm$2.58. 
C) $\pm$3.78. 
D) $\pm$9.78. 
A) $\pm$1.96. 
B) $\pm$2.58. 
C) $\pm$3.78. 
D) $\pm$9.78.

Question 7

We have used an alpha of 0.01 to estimate the average hours of television viewing for residents in a retirement home.What is the chance that our interval estimate does not contain the true population mean?

Accepted Answer

A) 99% 
B) 10% 
C) 1% 
D) 1/10 of 1% 
A) 99% 
B) 10% 
C) 1% 
D) 1/10 of 1%

Question 8

In estimation procedures,as the alpha level decreases,the corresponding Z score

Accepted Answer

A) moves closer to the mean of the sampling distribution. 
B) moves away from the mean of the sampling distribution. 
C) becomes negative. 
D) becomes positive. 
A) moves closer to the mean of the sampling distribution. 
B) moves away from the mean of the sampling distribution. 
C) becomes negative. 
D) becomes positive.

Question 9

Instruction: For each situation below,construct the 95% confidence interval estimate to the population.Assume that the results are based on a nationally representative sample.Express the estimate in a sentence.
Refer to the instruction.Of the 1220 respondents for whom we have information,178 said that they had been divorced at least once.

Accepted Answer

0.15@#LAT-DLM& 0.03 or: The pe

Question 10

An alpha level of 0.05 is the same as a confidence level of

Accepted Answer

A) 99.5%. 
B) 95%. 
C) 90.5%. 
D) 90%. 
A) 99.5%. 
B) 95%. 
C) 90.5%. 
D) 90%.

Question 11

Instruction: For each situation below,construct the 95% confidence interval estimate to the population.Assume that the results are based on a nationally representative sample.Express the estimate in a sentence.
Refer to the instruction.The average age of the 1225 respondents was 25.3 with a standard deviation of 1.9.

Accepted Answer

25.3@#LAT-DLM& 0.11 or:The ave

Question 12

The probability that a sample mean is within$\pm$ 1 Z of the population mean is about

Accepted Answer

A) .34. 
B) .68. 
C) .95. 
D) .99. 
A) .34. 
B) .68. 
C) .95. 
D) .99.

Question 13

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 parameter is

Accepted Answer

A) 300. 
B) 30. 
C) $\pm$2. 
D) unknown. 
A) 300. 
B) 30. 
C) $\pm$2. 
D) unknown.

Question 14

All other things being equal,larger sample will cost more to process

Accepted Answer

A) but will not necessarily have narrower confidence intervals. 
B) and will always produce narrower confidence intervals. 
C) and will always produce wider confidence intervals. 
D) but will produce more precise intervals if the confidence level is low. 
A) but will not necessarily have narrower confidence intervals. 
B) and will always produce narrower confidence intervals. 
C) and will always produce wider confidence intervals. 
D) but will produce more precise intervals if the confidence level is low.

Question 15

In a two person race,if the Republican presidential candidate is projected to attract 44%$\pm$ 3% of the vote,and the Democratic candidate is projected to attract 46%$\pm$ 3% of the vote,then

Accepted Answer

A) the Republican is the probable winner. 
B) the Democrat is the probable winner. 
C) neither candidate will win a majority of votes in the electoral college. 
D) the race is "too close to call." 
A) the Republican is the probable winner. 
B) the Democrat is the probable winner. 
C) neither candidate will win a majority of votes in the electoral college. 
D) the race is "too close to call."

Question 16

The average weight of a sample of women who attend aerobics classes at the YWCA is 130 pounds.We construct a confidence interval (using an alpha of 0.05)of$\pm$3.45.The upper and lower limits of our estimate are

Accepted Answer

A) 130.00 and 133.45. 
B) 126.55 and 130.45. 
C) 126.55 and 133.45. 
D) unknown;these values will depend on the number of women who are truly serious about exercising. 
A) 130.00 and 133.45. 
B) 126.55 and 130.45. 
C) 126.55 and 133.45. 
D) unknown;these values will depend on the number of women who are truly serious about exercising.

Question 17

In the United States,between 70% and 80% of the people who do the family grocery shopping are women.This is

Accepted Answer

A) not a finding which can be generalized. 
B) a point estimate. 
C) an interval estimate. 
D) sexism at its most offensive. 
A) not a finding which can be generalized. 
B) a point estimate. 
C) an interval estimate. 
D) sexism at its most offensive.

Question 18

The goal of estimation procedures is to infer ____ from ____.

Accepted Answer

A) intervals,estimates 
B) bias,efficiency 
C) statistics,parameters 
D) parameters,statistics 
A) intervals,estimates 
B) bias,efficiency 
C) statistics,parameters 
D) parameters,statistics

Question 19

The efficiency of any estimator can be improved by

Accepted Answer

A) increasing the sample size. 
B) decreasing the sample size. 
C) making the sample representative. 
D) changing the sample. 
A) increasing the sample size. 
B) decreasing the sample size. 
C) making the sample representative. 
D) changing the sample.

Question 20

A confidence level of 99% is the same as an alpha level of

Accepted Answer

A) 0.05. 
B) 0.10. 
C) 0.01. 
D) 0.001. 
A) 0.05. 
B) 0.10. 
C) 0.01. 
D) 0.001.

The probability that an interval estimate does not include the population value is called

Which sample size will produce the confidence interval with the smallest width?

Polls tracking the popularity of President Bush show

As our confidence in an interval estimate increases,the width of the interval

The most commonly used confidence level is

In estimation procedures,the Z score that corresponds to an alpha of .05 is

We have used an alpha of 0.01 to estimate the average hours of television viewing for residents in a retirement home.What is the chance that our interval estimate does not contain the true population mean?

In estimation procedures,as the alpha level decreases,the corresponding Z score

An alpha level of 0.05 is the same as a confidence level of

The probability that a sample mean is within $\pm$ 1 Z of the population mean is about

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 parameter is

All other things being equal,larger sample will cost more to process

In a two person race,if the Republican presidential candidate is projected to attract 44% $\pm$ 3% of the vote,and the Democratic candidate is projected to attract 46% $\pm$ 3% of the vote,then

The average weight of a sample of women who attend aerobics classes at the YWCA is 130 pounds.We construct a confidence interval (using an alpha of 0.05)of $\pm$ 3.45.The upper and lower limits of our estimate are

In the United States,between 70% and 80% of the people who do the family grocery shopping are women.This is

The goal of estimation procedures is to infer from .

The efficiency of any estimator can be improved by

A confidence level of 99% is the same as an alpha level 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

The probability that an interval estimate does not include the population value is called

Which sample size will produce the confidence interval with the smallest width?

Polls tracking the popularity of President Bush show

As our confidence in an interval estimate increases,the width of the interval

The most commonly used confidence level is

In estimation procedures,the Z score that corresponds to an alpha of .05 is

We have used an alpha of 0.01 to estimate the average hours of television viewing for residents in a retirement home.What is the chance that our interval estimate does not contain the true population mean?

In estimation procedures,as the alpha level decreases,the corresponding Z score

An alpha level of 0.05 is the same as a confidence level of

The probability that a sample mean is within ±\pm± 1 Z of the population mean is about

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 parameter is

All other things being equal,larger sample will cost more to process

In a two person race,if the Republican presidential candidate is projected to attract 44% ±\pm± 3% of the vote,and the Democratic candidate is projected to attract 46% ±\pm± 3% of the vote,then

The average weight of a sample of women who attend aerobics classes at the YWCA is 130 pounds.We construct a confidence interval (using an alpha of 0.05)of ±\pm± 3.45.The upper and lower limits of our estimate are

In the United States,between 70% and 80% of the people who do the family grocery shopping are women.This is

The goal of estimation procedures is to infer ____ from ____.

The efficiency of any estimator can be improved by

A confidence level of 99% is the same as an alpha level 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

The probability that a sample mean is within $\pm$ 1 Z of the population mean is about

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 parameter is

In a two person race,if the Republican presidential candidate is projected to attract 44% $\pm$ 3% of the vote,and the Democratic candidate is projected to attract 46% $\pm$ 3% of the vote,then

The average weight of a sample of women who attend aerobics classes at the YWCA is 130 pounds.We construct a confidence interval (using an alpha of 0.05)of $\pm$ 3.45.The upper and lower limits of our estimate are

The goal of estimation procedures is to infer from .