Question 1

With a sample size of 75,a normal sampling distribution can be assumed if

Accepted Answer

A) the cases in the sample are homogeneous. 
B) the cases in the sample are heterogeneous. 
C) the population distribution is normal. 
D) the sample distribution is normal. 
A) the cases in the sample are homogeneous. 
B) the cases in the sample are heterogeneous. 
C) the population distribution is normal. 
D) the sample distribution is normal.

Question 2

I surveyed 48 randomly-selected residents of the apartment complex where I live to determine their voting habits.I can only use this information to generalize to all the residents if

Accepted Answer

A) there is evidence of a normal population distribution. 
B) the 48 residents all have the same voting habits. 
C) the 48 residents are equally divided in their voting habits. 
D) the sample distribution is not normal in shape. 
A) there is evidence of a normal population distribution. 
B) the 48 residents all have the same voting habits. 
C) the 48 residents are equally divided in their voting habits. 
D) the sample distribution is not normal in shape.

Question 3

A researcher tests a theory about sexism by administering a survey to the 200 students in her sociology classes.This sample is best characterized as a

Accepted Answer

A) cluster sample. 
B) stratified random sample. 
C) non-probability sample. 
D) sampling distribution. 
A) cluster sample. 
B) stratified random sample. 
C) non-probability sample. 
D) sampling distribution.

Question 4

A researcher questioned 45 randomly-selected members of the freshman class about their experiences drinking alcohol and used these responses to estimate the drinking behavior of the entire freshman class of 1500.In this example,the 45 interviewees were the ____ and the ____ was the population.

Accepted Answer

A) sample;student body 
B) parameters;freshman class 
C) statistics;parameters 
D) sample;freshman class 
A) sample;student body 
B) parameters;freshman class 
C) statistics;parameters 
D) sample;freshman class

Question 5

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 6

The purpose of inferential statistics is to acquire knowledge of the ____ from the ____ by means of the ____ distribution

Accepted Answer

A) population;sample;sampling 
B) sample;sampling;population 
C) inductive;empirical;stratified 
D) theoretical;empirical;theoretical 
A) population;sample;sampling 
B) sample;sampling;population 
C) inductive;empirical;stratified 
D) theoretical;empirical;theoretical

Question 7

Statistics are characteristics of samples while ____ are characteristics of ____.

Accepted Answer

A) percentages;populations 
B) medians;clusters 
C) parameters;stratified samples 
D) parameters;populations 
A) percentages;populations 
B) medians;clusters 
C) parameters;stratified samples 
D) parameters;populations

Question 8

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 9

The General Social Survey (GSS)is an example of a

Accepted Answer

A) sample. 
B) sampling distribution. 
C) population. 
D) all of these 
A) sample. 
B) sampling distribution. 
C) population. 
D) all of these

Question 10

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.
a.The average age of the 1225 respondents was 25.3 with a standard deviation of 1.9.
b.Of the 998 respondents questioned, 246 identified themselves as Catholic.
c.Of the 1220 respondents for whom we have information, 178 said that they had been divorced at least once.
d.Four hundred and thirty two of the 668 respondents questioned said that they favored capital punishment for people convicted of murder. Ten years ago, in response to the same question, 378 out of 703 people were in favor of capital punishment. Has support for capital punishment risen over the ten year period?
e.The average number of children for the 945 respondents for which we have information was 1.98 with a standard deviation of 1.04.
f.The average years of school completed for 734 respondents was 11.9 with a standard deviation of 0.5.

Accepted Answer

a. @#LAT-DLM& or: The average age of the popriatio

Question 11

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 12

Using the General Social Survey as an example,the concept of the sampling distribution allows us to link the sample of about ____ respondents to the population of about ____ adult Americans

Accepted Answer

A) 10,000;200 million 
B) 225 million;3000 
C) 1 million;300 million 
D) 3,000 or 4,000;225 million 
A) 10,000;200 million 
B) 225 million;3000 
C) 1 million;300 million 
D) 3,000 or 4,000;225 million

Question 13

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 14

The greater the confidence level,the ____ width of the confidence interval

Accepted Answer

A) narrower 
B) more representative 
C) more efficient 
D) wider 
A) narrower 
B) more representative 
C) more efficient 
D) wider

Question 15

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 16

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.

Question 17

The mean age of all college graduates is 35.If the population distribution is normal,the mean of any sampling distribution of sample mean ages of college graduates will be

Accepted Answer

A) within plus or minus 1 standard deviation of 35. 
B) close to 35. 
C) 35. 
D) determined by the size of the distribution. 
A) within plus or minus 1 standard deviation of 35. 
B) close to 35. 
C) 35. 
D) determined by the size of the distribution.

Question 18

According to the theorems presented in Chapter 7,we can be sure that the sampling distribution is normal if

Accepted Answer

A) the population is small. 
B) the population is normal. 
C) the sample is stratified. 
D) the sample is normal. 
A) the population is small. 
B) the population is normal. 
C) the sample is stratified. 
D) the sample is normal.

Question 19

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 20

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.

With a sample size of 75,a normal sampling distribution can be assumed if

I surveyed 48 randomly-selected residents of the apartment complex where I live to determine their voting habits.I can only use this information to generalize to all the residents if

A researcher tests a theory about sexism by administering a survey to the 200 students in her sociology classes.This sample is best characterized as a

A researcher questioned 45 randomly-selected members of the freshman class about their experiences drinking alcohol and used these responses to estimate the drinking behavior of the entire freshman class of 1500.In this example,the 45 interviewees were the and the was the population.

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

The purpose of inferential statistics is to acquire knowledge of the from the by means of the distribution

Statistics are characteristics of samples while are characteristics of .

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 General Social Survey (GSS)is an example of a

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

Using the General Social Survey as an example,the concept of the sampling distribution allows us to link the sample of about respondents to the population of about adult Americans

The larger the sample size (N),the

The greater the confidence level,the ____ width of the confidence interval

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

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

The mean age of all college graduates is 35.If the population distribution is normal,the mean of any sampling distribution of sample mean ages of college graduates will be

According to the theorems presented in Chapter 7,we can be sure that the sampling distribution is normal if

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

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

Introduction

Basic Descriptive Statistics: Percentages Ratios and Rates Frequency Distributions

Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

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

Introduction to Bivariate Association and Measures of Association for Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 7: Introduction in Inferential Statistics, the Sampling Distribution, and Estimation

With a sample size of 75,a normal sampling distribution can be assumed if

I surveyed 48 randomly-selected residents of the apartment complex where I live to determine their voting habits.I can only use this information to generalize to all the residents if

A researcher tests a theory about sexism by administering a survey to the 200 students in her sociology classes.This sample is best characterized as a

A researcher questioned 45 randomly-selected members of the freshman class about their experiences drinking alcohol and used these responses to estimate the drinking behavior of the entire freshman class of 1500.In this example,the 45 interviewees were the ____ and the ____ was the population.

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

The purpose of inferential statistics is to acquire knowledge of the ____ from the ____ by means of the ____ distribution

Statistics are characteristics of samples while ____ are characteristics of ____.

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 General Social Survey (GSS)is an example of a

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

Using the General Social Survey as an example,the concept of the sampling distribution allows us to link the sample of about ____ respondents to the population of about ____ adult Americans

The larger the sample size (N),the

The greater the confidence level,the ____ width of the confidence interval

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

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

The mean age of all college graduates is 35.If the population distribution is normal,the mean of any sampling distribution of sample mean ages of college graduates will be

According to the theorems presented in Chapter 7,we can be sure that the sampling distribution is normal if

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

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

Introduction

Basic Descriptive Statistics: Percentages Ratios and Rates Frequency Distributions

Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

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

Introduction to Bivariate Association and Measures of Association for Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and Multiple Regression and Correlation

Filters

A researcher questioned 45 randomly-selected members of the freshman class about their experiences drinking alcohol and used these responses to estimate the drinking behavior of the entire freshman class of 1500.In this example,the 45 interviewees were the and the was the population.

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

The purpose of inferential statistics is to acquire knowledge of the from the by means of the distribution

Statistics are characteristics of samples while are characteristics of .

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

Using the General Social Survey as an example,the concept of the sampling distribution allows us to link the sample of about respondents to the population of about adult Americans

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