Question 1

To compare the effect of weather on sales of soft drinks, a distributor surveyed people in two regions of the country and asked if they purchased soft drinks in the last month. The following are the results. The distributor would like to know if there is a difference in sales between the two regions.  What is the value of the test statistic?

Accepted Answer

The answer of To compare the effect of weather on...

Question 2

What is the critical value at the 0.05 level of significance for a goodness-of-fit test if there are six categories?

Accepted Answer

A)  3.841 
B)  5.991 
C)  7.815 
D)  11.070

Question 3

To compare the effect of weather on sales of soft drinks, a distributor surveyed people in two regions of the country and asked if they purchased soft drinks in the last month. The following are the results. The distributor would like to know if there is a difference in sales between the two regions.  What is the proportion of sales made in Region B?

Accepted Answer

The answer of To compare the effect of weather on...

Question 4

How is a pooled estimate of the population proportion represented?

Accepted Answer

A)  pc 
B)  z 
C)  π 
D)  nπ

Question 5

A survey of property owners' opinions about a street-widening project was taken to determine if owners' opinions were related to the distance between their home and the street. A randomly selected sample of 100 property owners was contacted and the results are shown next.  What are the degrees of freedom for testing the null hypothesis?

Accepted Answer

The answer of A survey of property owners' opinions about...

Question 6

A personnel manager is concerned about absenteeism. She decides to sample employee records to determine if absenteeism is distributed evenly throughout the six-day workweek. The null hypothesis is: Absenteeism is distributed evenly throughout the week. The 0.01 level is to be used. The sample results are:  What is the expected frequency?

Accepted Answer

A)  9 
B)  10 
C)  11 
D)  12

Question 7

A survey of property owners' opinions about a street-widening project was taken to determine if owners' opinions were related to the distance between their home and the street. A randomly selected sample of 100 property owners was contacted and the results are shown next.  At the 5% level of significance, what is the critical value?

Accepted Answer

The answer of A survey of property owners' opinions about...

Question 8

A survey of property owners' opinions about a street-widening project was taken to determine if owners' opinions were related to the distance between their home and the street. A randomly selected sample of 100 property owners was contacted and the results are shown next.  What is the expected frequency for people who are in favor of the project and have less than 45 feet of property foot-frontage?

Accepted Answer

A)  10 
B)  12 
C)  35 
D)  50

Question 9

The shape of the chi-square distribution depends on the size of the sample.

Accepted Answer

A) True 
 B)False

Question 10

A personnel manager is concerned about absenteeism. She decides to sample employee records to determine if absenteeism is distributed evenly throughout the six-day workweek. The null hypothesis is: Absenteeism is distributed evenly throughout the week. Use the 0.01 level of significance. The sample results are:  How many degrees of freedom are there?

Accepted Answer

A)  0 
B)  3 
C)  4 
D)  5

Question 11

Three new colors have been proposed for the Jeep Grand Cherokee vehicle. They are silvered-blue, almond, and willow green. The null hypothesis for a goodness-of-fit test would be _______________.

Accepted Answer

A)  That willow green is preferred over the other colors 
B)  That there is no preference between the colors 
C)  That any one color is preferred over the other colors 
D)  Impossible to determine

Question 12

For any goodness-of-fit test, the null hypothesis is that there is ____ difference between the expected and observed distributions.

Accepted Answer

The answer of For any goodness-of-fit test, the null hypothesis...

Question 13

For a contingency table test of independence, the formula to compute the degrees of freedom is __________________________________.

Accepted Answer

The answer of For a contingency table test of independence,...

Question 14

For any chi-square goodness-of-fit test, the number of degrees of freedom is found by ______.

Accepted Answer

A)  n - k - 1 
B)  k - 1 
C)  n + 1 
D)  n + k

Question 15

Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS station. What is the alternate hypothesis?

Accepted Answer

A)  H1: π = 0.36 
B)  H1: π = 0.41 
C)  H1: π ≠ 0.41 
D)  H1: µ ≠ 0.41

Question 16

A recent study of the relationship between social activity and education for a sample of corporate executives showed the following results.  The degrees of freedom for the analysis are __________.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4

Question 17

A sample of 250 adults tried the new multigrain cereal "Wow!" A total of 187 rated it as excellent. In a sample of 100 children, 66 rated it as excellent. Using the 0.1 significance level, the researcher wishes to show that adults like the cereal better than children. Which of the following is the alternate hypothesis?

Accepted Answer

A)  H1: πA = πC 
B)  H1: πA C 
C)  H1: πA > πC 
D)  H1: πA ≠ πC

Question 18

A recent study of the relationship between social activity and education for a sample of corporate executives showed the following results.  The null hypothesis for the analysis is __________________________.

Accepted Answer

A)  There is no relationship between social activity and education 
B)  The correlation between social activity and education is zero 
C)  As social activity increases, education increases 
D)  The mean of social activity equals the mean of education

Question 19

We are interested in knowing if the following frequency distribution is normally distributed. The population mean and standard deviation of the data are 600 and 160, respectively.  If the distribution was normally distributed, what is the expected frequency for the "400 up to 600" class?

Accepted Answer

The answer of We are interested in knowing if the...

Question 20

We are interested in knowing if the following frequency distribution is normally distributed. The population mean and standard deviation of the data are 600 and 160, respectively.  What are the standard normal z-statistic class limits for the "400 up to 600" class?

Accepted Answer

The answer of We are interested in knowing if the...

Exam 15: Nonparametric Methods: Nominal Level Hypothesis Tests

What is the critical value at the 0.05 level of significance for a goodness-of-fit test if there are six categories?

How is a pooled estimate of the population proportion represented?

The shape of the chi-square distribution depends on the size of the sample.

Three new colors have been proposed for the Jeep Grand Cherokee vehicle. They are silvered-blue, almond, and willow green. The null hypothesis for a goodness-of-fit test would be _______________.

For any goodness-of-fit test, the null hypothesis is that there is ____ difference between the expected and observed distributions.

For a contingency table test of independence, the formula to compute the degrees of freedom is __________________________________.

For any chi-square goodness-of-fit test, the number of degrees of freedom is found by ______.

Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS station. What is the alternate hypothesis?

A recent study of the relationship between social activity and education for a sample of corporate executives showed the following results. The degrees of freedom for the analysis are __________.

A recent study of the relationship between social activity and education for a sample of corporate executives showed the following results. The null hypothesis for the analysis is __________________________.

We are interested in knowing if the following frequency distribution is normally distributed. The population mean and standard deviation of the data are 600 and 160, respectively. If the distribution was normally distributed, what is the expected frequency for the "400 up to 600" class?

We are interested in knowing if the following frequency distribution is normally distributed. The population mean and standard deviation of the data are 600 and 160, respectively. What are the standard normal z-statistic class limits for the "400 up to 600" class?