Question 1

For a simple random sample,each case and each combination of cases in the population must

Accepted Answer

A) be representative. 
B) be included in the sample. 
C) be contacted by the researcher. 
D) have an equal probability of being chosen for the sample. 
A) be representative. 
B) be included in the sample. 
C) be contacted by the researcher. 
D) have an equal probability of being chosen for the sample.

Question 2

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 3

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 4

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.

Question 5

An estimator is unbiased if the mean of its sampling distribution is equal to

Accepted Answer

A) the midpoint of the distribution. 
B) the sample mean. 
C) the population value. 
D) the population median. 
A) the midpoint of the distribution. 
B) the sample mean. 
C) the population value. 
D) the population median.

Question 6

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 7

The goal of all techniques for selecting probability samples is to select samples that are

Accepted Answer

A) very large. 
B) non-random. 
C) easily located. 
D) representative. 
A) very large. 
B) non-random. 
C) easily located. 
D) representative.

Question 8

Compared to probability samples,non-probability samples

Accepted Answer

A) are usually cheaper to assemble. 
B) are always much larger. 
C) are usually more expensive to assemble. 
D) allow for generalizations to populations. 
A) are usually cheaper to assemble. 
B) are always much larger. 
C) are usually more expensive to assemble. 
D) allow for generalizations to populations.

Question 9

Explain random sampling.How does this technique ensure a high probability that the sample will be representativeness?

Accepted Answer

Random sampling is a technique used in s

Question 10

In a sampling distribution of sample means,most of the sample means will

Accepted Answer

A) cluster around the true population value. 
B) be below the population mean in value. 
C) be above the population mean in value. 
D) not follow any particular pattern. 
A) cluster around the true population value. 
B) be below the population mean in value. 
C) be above the population mean in value. 
D) not follow any particular pattern.

Question 11

Unlike the sample and population distributions,the sampling distribution is

Accepted Answer

A) empirical. 
B) theoretical. 
C) random. 
D) EPSEM. 
A) empirical. 
B) theoretical. 
C) random. 
D) EPSEM.

Question 12

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 13

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

Question 14

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 15

What are the three distributions involved in every application of inferential statistics?

Accepted Answer

A) sample,sampling,and population 
B) sample,stratification,cluster 
C) EPSEM,random,probability 
D) sampling,percentage,normal 
A) sample,sampling,and population 
B) sample,stratification,cluster 
C) EPSEM,random,probability 
D) sampling,percentage,normal

Question 16

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.

Question 17

If a sample is representative,it

Accepted Answer

A) is stratified. 
B) is restricted to the calculation of parameters only. 
C) reproduces the characteristics of the population. 
D) resembles the sampling distribution 
A) is stratified. 
B) is restricted to the calculation of parameters only. 
C) reproduces the characteristics of the population. 
D) resembles the sampling distribution

Question 18

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 19

Unless a sample is ____,it cannot be used to make accurate generalizations to a population.

Accepted Answer

A) very large 
B) non-probability 
C) representative 
D) stratified 
A) very large 
B) non-probability 
C) representative 
D) stratified

Question 20

Your sample size is 1000.It is safe to assume that

Accepted Answer

A) the shape of the sampling distribution of sample means is normal. 
B) the sample is representative of the population. 
C) the population distribution is normal. 
D) the sample distribution is normal. 
A) the shape of the sampling distribution of sample means is normal. 
B) the sample is representative of the population. 
C) the population distribution is normal. 
D) the sample distribution is normal.

For a simple random sample,each case and each combination of cases in the population must

Two sample statistics are unbiased estimators.They are

In estimation procedures,the alpha level is

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

An estimator is unbiased if the mean of its sampling distribution is equal to

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?

The goal of all techniques for selecting probability samples is to select samples that are

Compared to probability samples,non-probability samples

Explain random sampling.How does this technique ensure a high probability that the sample will be representativeness?

In a sampling distribution of sample means,most of the sample means will

Unlike the sample and population distributions,the sampling distribution is

To construct the narrowest possible confidence intervals,use ____.

The width of an interval estimate can be controlled by

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

What are the three distributions involved in every application of inferential statistics?

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

If a sample is representative,it

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

Unless a sample is ____,it cannot be used to make accurate generalizations to a population.

Your sample size is 1000.It is safe to assume that

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

For a simple random sample,each case and each combination of cases in the population must

Two sample statistics are unbiased estimators.They are

In estimation procedures,the alpha level is

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

An estimator is unbiased if the mean of its sampling distribution is equal to

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?

The goal of all techniques for selecting probability samples is to select samples that are

Compared to probability samples,non-probability samples

Explain random sampling.How does this technique ensure a high probability that the sample will be representativeness?

In a sampling distribution of sample means,most of the sample means will

Unlike the sample and population distributions,the sampling distribution is

To construct the narrowest possible confidence intervals,use ____.

The width of an interval estimate can be controlled by

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

What are the three distributions involved in every application of inferential statistics?

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

If a sample is representative,it

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

Unless a sample is ____,it cannot be used to make accurate generalizations to a population.

Your sample size is 1000.It is safe to assume that

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

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