Question 1

A collection of statistical methods that generally requires very few, if any, assumptions about the population distribution is known as

Accepted Answer

A) parametric methods 
B) nonparametric methods 
C) distribution-fixed methods 
D) normal 
A) parametric methods 
B) nonparametric methods 
C) distribution-fixed methods 
D) normal

Question 2

A PTA group wishes to determine whether a barrage of letters sent to the local station has reduced the amount of violence broadcast between the hours of 4 P.M. and 9 P.M. The results of a survey of viewers are given here.   Carry out a sign test to determine whether or not the letters were effective in reducing the amount of violence during the 4 to 9 p.m. period. Use a .05 level of significance. Be sure to state the null and alternative hypotheses.

Accepted Answer

H₀: p = 0.5 H_a: p @#LAT-DLM& 0.5

Question 3

Exhibit 19-6
Forty-one individuals from a sample of 60 indicated they oppose legalized abortion. We are interested in determining whether or not there is a significant difference between the proportions of opponents and proponents of legalized abortion.
-Refer to Exhibit 19-6. The conclusion is that there

Accepted Answer

A) is no significant difference between the proportions 
B) is a significant difference between the proportions 
C) could be a difference in proportions, depending on the sample size 
D) None of these alternatives is correct. 
A) is no significant difference between the proportions 
B) is a significant difference between the proportions 
C) could be a difference in proportions, depending on the sample size 
D) None of these alternatives is correct.

Question 4

In a sample of 400 people, 250 indicated that they prefer domestic wines, while 140 said they prefer European wines, and 10 indicated no preference. We want to use the sign test to determine if there is evidence of a significant difference in the preferences for the two types of wine.
a.Provide the hypotheses to be tested.
b.Compute the mean.
c.Compute the standard deviation.
d..
At 95% confidence, test to determine if there is evidence of a significant difference in the preferences for the two types of wine.

Accepted Answer

a.H_o: P = 0.5 H_a: P @#LAT-DLM&0.5 b.195 c.

Question 5

Statistical methods that require assumptions about the population are known as

Accepted Answer

A) distribution free 
B) nonparametric 
C) either distribution free of nonparametric 
D) parametric 
A) distribution free 
B) nonparametric 
C) either distribution free of nonparametric 
D) parametric

Question 6

Exhibit 19-1
Fifteen people were given two types of cereal, Brand X and Brand Y. Two people preferred Brand X and thirteen people preferred Brand Y. We want to determine whether or not customers prefer one brand over the other.
-Refer to Exhibit 19-1. The null hypothesis that is being tested is

Accepted Answer

A) H0: $\mu$= 5 
B) H0: $\mu$ = 0.5 
C) H0: P = 5 
D) H0: P = 0.5 
A) H0: $\mu$= 5 
B) H0: $\mu$ = 0.5 
C) H0: P = 5 
D) H0: P = 0.5

Question 7

Two individuals were asked to rank the performances of eight different automobiles. The following show their rankings.   Determine the Spearman rank-correlation coefficient; and at 95% confidence, test for its significance.

Accepted Answer

r_s = 0.0714 Z = 0.19;

Question 8

Exhibit 19-6
Forty-one individuals from a sample of 60 indicated they oppose legalized abortion. We are interested in determining whether or not there is a significant difference between the proportions of opponents and proponents of legalized abortion.
-Refer to Exhibit 19-6. $\mu$ in this situation is

Accepted Answer

A) 60 
B) 30 
C) 41 
D) 2 
A) 60 
B) 30 
C) 41 
D) 2

Question 9

The labeling of parts as "defective" or "non-defective" is an example of

Accepted Answer

A) ordinal data 
B) ratio data 
C) interval data 
D) nominal data 
A) ordinal data 
B) ratio data 
C) interval data 
D) nominal data

Question 10

A comprehensive statistics examination is given to 16 students in order to determine whether or not there is a significant difference in the performance of students majoring in the various disciplines of Business Administration. The following data show the scores of the 16 students (5 majoring in accounting, 6 majoring in management, and 5 majoring in marketing).   At $\alpha$= 0.05 level of significance, test to see if there is a significant difference in the performance of the students in the three majors.

Accepted Answer

W = 0.36; p-value >

Question 11

The president of a company wants to see if the new anti-smoking campaign is having any influence on his employees. A sample of 100 employees who smoked prior to the campaign is taken. Thirty-six employees said they smoked less, 15 employees said they smoked more, and 49 employees said there was no change.
a.State the null and alternative hypotheses.
b.Test the null hypothesis at the 1% level of significance.

Accepted Answer

a.H₀: p = 0.5 H_a: p @#LAT-DLM& 0

Question 12

Test scores of ten individuals before and after a training program are shown below.   At$\alpha$ = 0.05, what can be concluded about the effectiveness of the training program?

Accepted Answer

Z = -1.66; p-value =

Question 13

A survey of male and female students showed the following ranking of 12 professors in the management department:   Do the rankings given by the female students agree with the rankings given by the male students? Use $\alpha$ = 0.05.

Accepted Answer

r_s = -0.028; Z = -0.0

Question 14

The following data show the test scores of six individuals on a standardized test before and after attending a preparation seminar for the test.   Use the Wilcoxon Signed-Rank test in order to determine whether or nor the seminar has been effective. Hint: This is a one tailed test. Let $\alpha$ = 0.05.

Accepted Answer

Z = -0.94;

Question 15

Which of the following tests would not be an example of nonparametric method?

Accepted Answer

A) Mann-Whitney-Wilcoxon test 
B) Wilcoxon signed-rank test 
C) sign test 
D) t test 
A) Mann-Whitney-Wilcoxon test 
B) Wilcoxon signed-rank test 
C) sign test 
D) t test

Question 16

From the courthouse records, it is found that in 60 divorce cases, the filing for divorce was initiated by the wife 41 times. Using the sign test, test for a difference in filing between husband and wives. Let $\alpha$ = 0.05

Accepted Answer

Z = 2.84; p-value =

Question 17

It is believed that the median age of college students is 21 years. A sample of 80 college students is taken. Thirty of the students were under 21, 45 of the students were over 21, and 10 were 21 years old.
a.State the null and alternative hypotheses.
b.Test the null hypothesis at the 1% level of significance.

Accepted Answer

a.H₀: Median = 21 H_a:

Question 18

A sign test is a

Accepted Answer

A) parametric method for determining the differences between two populations based on two matched samples 
B) nonparametric method for determining the differences between two populations based on two matched samples 
C) nonparametric method for determining the differences between two or more populations based on two or more matched samples 
D) parametric method for determining the differences between two or more populations based on two or more matched samples 
A) parametric method for determining the differences between two populations based on two matched samples 
B) nonparametric method for determining the differences between two populations based on two matched samples 
C) nonparametric method for determining the differences between two or more populations based on two or more matched samples 
D) parametric method for determining the differences between two or more populations based on two or more matched samples

Question 19

The scale of measurement that is used to rank order the observation for a variable is called the

Accepted Answer

A) ratio scale 
B) ordinal scale 
C) nominal scale 
D) interval scale 
A) ratio scale 
B) ordinal scale 
C) nominal scale 
D) interval scale

Question 20

The Spearman rank-correlation coefficient is

Accepted Answer

A) a correlation measure based on the average of data items 
B) a correlation measure based on rank-ordered data for two variables 
C) a correlation measure based on the median of data items 
D) None of these alternatives is correct. 
A) a correlation measure based on the average of data items 
B) a correlation measure based on rank-ordered data for two variables 
C) a correlation measure based on the median of data items 
D) None of these alternatives is correct.

A collection of statistical methods that generally requires very few, if any, assumptions about the population distribution is known as

Statistical methods that require assumptions about the population are known as

Exhibit 19-1 Fifteen people were given two types of cereal, Brand X and Brand Y. Two people preferred Brand X and thirteen people preferred Brand Y. We want to determine whether or not customers prefer one brand over the other. -Refer to Exhibit 19-1. The null hypothesis that is being tested is

Two individuals were asked to rank the performances of eight different automobiles. The following show their rankings. Determine the Spearman rank-correlation coefficient; and at 95% confidence, test for its significance.

The labeling of parts as "defective" or "non-defective" is an example of

Which of the following tests would not be an example of nonparametric method?

From the courthouse records, it is found that in 60 divorce cases, the filing for divorce was initiated by the wife 41 times. Using the sign test, test for a difference in filing between husband and wives. Let $\alpha$ = 0.05

A sign test is a

The scale of measurement that is used to rank order the observation for a variable is called the

The Spearman rank-correlation coefficient is

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Statistical Methods for Quality Control

Index Numbers

Decision Analysis on Website

Sample Survey on Website

Filters

Exam 18: Nonparametric Methods

A collection of statistical methods that generally requires very few, if any, assumptions about the population distribution is known as

Statistical methods that require assumptions about the population are known as

Exhibit 19-1 Fifteen people were given two types of cereal, Brand X and Brand Y. Two people preferred Brand X and thirteen people preferred Brand Y. We want to determine whether or not customers prefer one brand over the other. -Refer to Exhibit 19-1. The null hypothesis that is being tested is

Two individuals were asked to rank the performances of eight different automobiles. The following show their rankings. Determine the Spearman rank-correlation coefficient; and at 95% confidence, test for its significance.

The labeling of parts as "defective" or "non-defective" is an example of

Test scores of ten individuals before and after a training program are shown below. At α\alphaα = 0.05, what can be concluded about the effectiveness of the training program?

A survey of male and female students showed the following ranking of 12 professors in the management department: Do the rankings given by the female students agree with the rankings given by the male students? Use α\alphaα = 0.05.

Which of the following tests would not be an example of nonparametric method?

From the courthouse records, it is found that in 60 divorce cases, the filing for divorce was initiated by the wife 41 times. Using the sign test, test for a difference in filing between husband and wives. Let α\alphaα = 0.05

A sign test is a

The scale of measurement that is used to rank order the observation for a variable is called the

The Spearman rank-correlation coefficient is

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Statistical Methods for Quality Control

Index Numbers

Decision Analysis on Website

Sample Survey on Website

Filters

From the courthouse records, it is found that in 60 divorce cases, the filing for divorce was initiated by the wife 41 times. Using the sign test, test for a difference in filing between husband and wives. Let $\alpha$ = 0.05