Question 1

If the expected value of the sample statistic is equal to the population parameter being estimated, the sample statistic is said to ​

Accepted Answer

A) ​have low variability. 
B) ​be an unbiased estimator of the population parameter. 
C) ​have high precision. 
D) ​be a random estimator of the population parameter. 
A) ​have low variability. 
B) ​be an unbiased estimator of the population parameter. 
C) ​have high precision. 
D) ​be a random estimator of the population parameter.

Question 2

What is the difference between the standardized normal distribution (used for tests with z) and the t distribution?
​

Accepted Answer

The t distribution is used whe

Question 3

An estimate of a population parameter that provides an interval of values believed to contain the value of the parameter is known as the

Accepted Answer

A) confidence level. 
B) interval estimate 
C) parameter level. 
D) population estimate. 
A) confidence level. 
B) interval estimate 
C) parameter level. 
D) population estimate.

Question 4

The proportion of dental procedures that are extractions is 0.16. Which of the following exemplifies a type I error in this situation? ​​

Accepted Answer

A) Reject the claim that the proportion of dental procedures that are extractions is 0.16 when the proportion is actually different from 0.16. 
B) Fail to reject the claim that the proportion of dental procedures that are extractions is 0.16 when the proportion is actually 0.16 
C) Reject the claim that the proportion of dental procedures that are extractions is 0.16 when the proportion is actually 0.16 
D) Fail to reject the claim that the proportion of dental procedures that are extractions is 0.16 when the proportion is actually different from 0.16 
A) Reject the claim that the proportion of dental procedures that are extractions is 0.16 when the proportion is actually different from 0.16. 
B) Fail to reject the claim that the proportion of dental procedures that are extractions is 0.16 when the proportion is actually 0.16 
C) Reject the claim that the proportion of dental procedures that are extractions is 0.16 when the proportion is actually 0.16 
D) Fail to reject the claim that the proportion of dental procedures that are extractions is 0.16 when the proportion is actually different from 0.16

Question 5

A statistics teacher started class one day by drawing the names of 10 students out of a hat and asked them to do as many pushups as they could. The 10 randomly selected students averaged 15 pushups per person with a standard deviation of 9 pushups.Suppose the distribution of the population of number of pushups that can be done is approximately normal. If we would like to capture the population mean with 95% confidence the margin of error would be ??

Accepted Answer

A)  $1.960 \left( \frac { 9 } { \sqrt { 10 } } \right)$ 
B) ? $2.125 \left( \frac { 15 } { \sqrt { 10 } } \right)$ 
C) ? $2.262 \left( \frac { 9 } { \sqrt { 10 } } \right)$ 
D) ? $3.250 \left( \frac { 15 } { \sqrt { 10 } } \right)$ 
A)  $1.960 \left( \frac { 9 } { \sqrt { 10 } } \right)$ 
B) ? $2.125 \left( \frac { 15 } { \sqrt { 10 } } \right)$ 
C) ? $2.262 \left( \frac { 9 } { \sqrt { 10 } } \right)$ 
D) ? $3.250 \left( \frac { 15 } { \sqrt { 10 } } \right)$

Question 6

The sample mean is the point estimator of what population parameter?
​

Accepted Answer

The answer of The sample mean is the point estimator...

Question 7

A simple random sample of 11 observations from a population containing 400 female soccer players was taken, and the following values were obtained.
​
48 53 72 56 63 64 56 76 50 46 73
​
What is the value of the point estimate of the population mean?

Accepted Answer

The answer of A simple random sample of 11 observations...

Question 8

What is the general form of an interval estimate?
​

Accepted Answer

point esti

Question 9

The value of the ___________ is used to estimate the value of the population parameter.

Accepted Answer

A) ​population statistic 
B) ​sample parameter 
C) ​population estimate 
D) sample statistic 
A) ​population statistic 
B) ​sample parameter 
C) ​population estimate 
D) sample statistic

Question 10

A Type I error is committed when

Accepted Answer

A) ​a true alternative hypothesis is not accepted. 
B) a true null hypothesis is rejected. 
C) ​the critical value is greater than the value of the test statistic. 
D) the validity of a claim was rejected. 
A) ​a true alternative hypothesis is not accepted. 
B) a true null hypothesis is rejected. 
C) ​the critical value is greater than the value of the test statistic. 
D) the validity of a claim was rejected.

Question 11

It is impossible to construct a sampling frame for an __________ population
​

Accepted Answer

The answer of It is impossible to construct a sampling...

Question 12

You are _______________ to commit a Type I error using the 0.05 level of significance than using the 0.01 level of significance.

Accepted Answer

A) more likely 
B) less likely 
C) equally likely 
D) twice as likely 
A) more likely 
B) less likely 
C) equally likely 
D) twice as likely

Question 13

Random samples of size 100 are taken from an infinite population whose population proportion is 0.2. The mean and standard deviation of the sample proportion are?
​

Accepted Answer

The answer of Random samples of size 100 are taken...

Question 14

A sample of 92 observations is taken from an infinite population. The sampling distribution of is approximately normal because of what theorem?
​

Accepted Answer

The Centra

Question 15

A one-tailed test is a hypothesis test in which the rejection region is

Accepted Answer

A) in both tails of the sampling distribution. 
B) in one tail of the sampling distribution. 
C) only in the lower tail of the sampling distribution. 
D) only in the upper tail of the sampling distribution. 
A) in both tails of the sampling distribution. 
B) in one tail of the sampling distribution. 
C) only in the lower tail of the sampling distribution. 
D) only in the upper tail of the sampling distribution.

Question 16

The finite correction factor should be used in the computation of the standard deviation of the sample mean and the standard population when n/N is ​

Accepted Answer

A) ​greater than 0.05. 
B) ​greater than 0.5. 
C) ​less than 0.05. 
D) ​less than 0.5. 
A) ​greater than 0.05. 
B) ​greater than 0.5. 
C) ​less than 0.05. 
D) ​less than 0.5.

Question 17

The medical director of a company looks at the medical records of all 50 employees and finds that the mean systolic blood pressure for these employees is 126.07.The value of 126.07 is symbolized by.
​
​

Accepted Answer

The answer of The medical director of a company looks...

Question 18

Statistical significance at the 0.01 level is___________ than significance at the 0.05 level .

Accepted Answer

A) more difficult to achieve 
B) easier to achieve 
C) less costly 
D) less informative 
A) more difficult to achieve 
B) easier to achieve 
C) less costly 
D) less informative

Question 19

The average number of hours for a random sample of mail order pharmacists from company A was 50.1 hours last year. It is believed that changes to medical insurance have led to a reduction in the average work week. To test the validity of this belief, the hypotheses are

Accepted Answer

A) H0: U > 50.1, Ha : U  
B) H0: U = 50.1, Ha : U ≠ 50.1. 
C) ​H0: U ≤ 50.1, Ha : U > 50.1. 
D) H0: U ≥ 50.1, Ha : U  
A) H0: U > 50.1, Ha : U  
B) H0: U = 50.1, Ha : U ≠ 50.1. 
C) ​H0: U ≤ 50.1, Ha : U > 50.1. 
D) H0: U ≥ 50.1, Ha : U

Question 20

The basis for using a normal probability distribution to approximate the sampling distribution of the sample means and population mean is

Accepted Answer

A) ​Chebyshev's theorem. 
B) ​the empirical rule. 
C) ​the central limit theorem. 
D) Bayes' theorem. 
A) ​Chebyshev's theorem. 
B) ​the empirical rule. 
C) ​the central limit theorem. 
D) Bayes' theorem.

If the expected value of the sample statistic is equal to the population parameter being estimated, the sample statistic is said to

What is the difference between the standardized normal distribution (used for tests with z) and the t distribution?

An estimate of a population parameter that provides an interval of values believed to contain the value of the parameter is known as the

The proportion of dental procedures that are extractions is 0.16. Which of the following exemplifies a type I error in this situation?

The sample mean is the point estimator of what population parameter?

A simple random sample of 11 observations from a population containing 400 female soccer players was taken, and the following values were obtained. 48 53 72 56 63 64 56 76 50 46 73 What is the value of the point estimate of the population mean?

What is the general form of an interval estimate?

The value of the ___________ is used to estimate the value of the population parameter.

A Type I error is committed when

It is impossible to construct a sampling frame for an __________ population

You are _______________ to commit a Type I error using the 0.05 level of significance than using the 0.01 level of significance.

Random samples of size 100 are taken from an infinite population whose population proportion is 0.2. The mean and standard deviation of the sample proportion are?

A sample of 92 observations is taken from an infinite population. The sampling distribution of is approximately normal because of what theorem?

A one-tailed test is a hypothesis test in which the rejection region is

The finite correction factor should be used in the computation of the standard deviation of the sample mean and the standard population when n/N is

The medical director of a company looks at the medical records of all 50 employees and finds that the mean systolic blood pressure for these employees is 126.07.The value of 126.07 is symbolized by.

Statistical significance at the 0.01 level is___________ than significance at the 0.05 level .

The average number of hours for a random sample of mail order pharmacists from company A was 50.1 hours last year. It is believed that changes to medical insurance have led to a reduction in the average work week. To test the validity of this belief, the hypotheses are

The basis for using a normal probability distribution to approximate the sampling distribution of the sample means and population mean is

Introduction

Descriptive Statistics

Data Visualization

Descriptive Data Mining

Probability: an Introduction to Modeling Uncertainty

Linear Regression

Time Series Analysis and Forecasting

Predictive Data Mining

Spreadsheet Models

Linear Optimization Models

Integer Linear Optimization Models

Nonlinear Optimization Models

Monte Carlo Simulation

Decision Analysis

Filters

Exam 6: Statistical Inference

If the expected value of the sample statistic is equal to the population parameter being estimated, the sample statistic is said to ​

What is the difference between the standardized normal distribution (used for tests with z) and the t distribution? ​

An estimate of a population parameter that provides an interval of values believed to contain the value of the parameter is known as the

The proportion of dental procedures that are extractions is 0.16. Which of the following exemplifies a type I error in this situation? ​​

The sample mean is the point estimator of what population parameter? ​

A simple random sample of 11 observations from a population containing 400 female soccer players was taken, and the following values were obtained. ​ 48 53 72 56 63 64 56 76 50 46 73 ​ What is the value of the point estimate of the population mean?

What is the general form of an interval estimate? ​

The value of the ___________ is used to estimate the value of the population parameter.

A Type I error is committed when

It is impossible to construct a sampling frame for an __________ population ​

You are _______________ to commit a Type I error using the 0.05 level of significance than using the 0.01 level of significance.

Random samples of size 100 are taken from an infinite population whose population proportion is 0.2. The mean and standard deviation of the sample proportion are? ​

A sample of 92 observations is taken from an infinite population. The sampling distribution of is approximately normal because of what theorem? ​

A one-tailed test is a hypothesis test in which the rejection region is

The finite correction factor should be used in the computation of the standard deviation of the sample mean and the standard population when n/N is ​

The medical director of a company looks at the medical records of all 50 employees and finds that the mean systolic blood pressure for these employees is 126.07.The value of 126.07 is symbolized by. ​ ​

Statistical significance at the 0.01 level is___________ than significance at the 0.05 level .

The average number of hours for a random sample of mail order pharmacists from company A was 50.1 hours last year. It is believed that changes to medical insurance have led to a reduction in the average work week. To test the validity of this belief, the hypotheses are

The basis for using a normal probability distribution to approximate the sampling distribution of the sample means and population mean is

Introduction

Descriptive Statistics

Data Visualization

Descriptive Data Mining

Probability: an Introduction to Modeling Uncertainty

Linear Regression

Time Series Analysis and Forecasting

Predictive Data Mining

Spreadsheet Models

Linear Optimization Models

Integer Linear Optimization Models

Nonlinear Optimization Models

Monte Carlo Simulation

Decision Analysis

Filters

If the expected value of the sample statistic is equal to the population parameter being estimated, the sample statistic is said to

What is the difference between the standardized normal distribution (used for tests with z) and the t distribution?

The proportion of dental procedures that are extractions is 0.16. Which of the following exemplifies a type I error in this situation?

The sample mean is the point estimator of what population parameter?

A simple random sample of 11 observations from a population containing 400 female soccer players was taken, and the following values were obtained. 48 53 72 56 63 64 56 76 50 46 73 What is the value of the point estimate of the population mean?

What is the general form of an interval estimate?

It is impossible to construct a sampling frame for an __________ population

Random samples of size 100 are taken from an infinite population whose population proportion is 0.2. The mean and standard deviation of the sample proportion are?

A sample of 92 observations is taken from an infinite population. The sampling distribution of is approximately normal because of what theorem?

The finite correction factor should be used in the computation of the standard deviation of the sample mean and the standard population when n/N is

The medical director of a company looks at the medical records of all 50 employees and finds that the mean systolic blood pressure for these employees is 126.07.The value of 126.07 is symbolized by.