Question 1

The following table shows the number of individuals in a sample of 450 who indicated they support the new tax proposal.  ​ We are interested in determining whether or not the opinions of the individuals of the three groups are uniformly distributed.The expected frequency for each group is

Accepted Answer

A)  .333. 
B)  .50. 
C)  150. 
D)  135.

Question 2

When individuals in a sample of 150 were asked whether or not they supported capital punishment, the following information was obtained.  ​ We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.The expected frequency for each group is

Accepted Answer

A)  .333. 
B)  .50. 
C)  1/3. 
D)  50.

Question 3

A group of 500 individuals were asked to cast their votes regarding a particular issue of the Equal Rights Amendment.The following table shows the results of the votes:  ​
At α = .05 using the p-value approach, test to determine if the votes cast were independent of the sex of the individuals.

Accepted Answer

The answer of A group of 500 individuals were asked...

Question 4

When individuals in a sample of 150 were asked whether or not they supported capital punishment, the following information was obtained.  ​ We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.The p-value is

Accepted Answer

A)  less than .01. 
B)  larger than .1. 
C)  between .01 and .05. 
D)  between .05 and .1.

Question 5

From a poll of 800 television viewers, the following data have been accumulated as to their levels of education and their preference of television stations.  ​
Test at α = .05 to determine if the selection of a TV station is dependent upon the level of education.Use the p-value approach.

Accepted Answer

The answer of From a poll of 800 television viewers,...

Question 6

Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors.A sample of 400 students taken from this year's student body showed the following number of students in each classification.  ​ We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.The calculated value for the test statistic equals

Accepted Answer

A)  .54. 
B)  .65. 
C)  2.063. 
D)  2.664.

Question 7

You want to test whether or not the following sample of 30 observations follows a normal distribution.The mean of the sample equals 11.83 and the standard deviation equals 4.53.  ​ The expected frequency in the 3rd interval is

Accepted Answer

A)  3. 
B)  4. 
C)  5. 
D)  10.

Question 8

Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors.A sample of 400 students taken from this year's student body showed the following number of students in each classification.  ​ We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.At a .01 level of significance, the null hypothesis

Accepted Answer

A)  should not be rejected. 
B)  should be rejected. 
C)  was designed wrong. 
D)  cannot be tested.

Question 9

The properties of a multinomial experiment include all of the following except​

Accepted Answer

A)  ​the experiment consists of a sequence of n identical trials. 
B)  ​three or more outcomes are possible on each trial. 
C)  ​the probability of each outcome can change from trial to trial. 
D)  ​the trials are independent.

Question 10

The number of categorical outcomes per trial for a multinomial probability distribution is​

Accepted Answer

A)  ​two or more. 
B)  ​three or more. 
C)  ​four or more. 
D)  ​five or more.

Question 11

Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors.A sample of 400 students taken from this year's student body showed the following number of students in each classification.  ​ We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.The p-value is

Accepted Answer

A)  less than .005. 
B)  between .025 and .05. 
C)  between .05 and .1. 
D)  greater than .1.

Question 12

In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College.To see whether or not the proportions have changed, a sample of 300 students from the university was taken.Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College.The hypothesis is to be tested at the 5% level of significance.The critical value from the table equals

Accepted Answer

A)  7.378. 
B)  9.348. 
C)  5.991. 
D)  7.815.

Question 13

An important application of the chi-square distribution is

Accepted Answer

A)  making inferences about a single population variance. 
B)  testing for goodness of fit. 
C)  testing for the independence of two categorical variables. 
D)  All of these alternatives are correct.

Question 14

The personnel department of a large corporation reported sixty resignations during the last year.The following table groups these resignations according to the season during which they occurred:  ​
Test to see if the proportion of resignations is uniform over the four seasons.
Let α = .05.

Accepted Answer

The answer of The personnel department of a large corporation...

Question 15

Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors.A sample of 400 students taken from this year's student body showed the following number of students in each classification.  ​ We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.The expected number of freshmen is

Accepted Answer

A)  120. 
B)  96. 
C)  113. 
D)  10.

Question 16

Before the rush began for Christmas shopping, a department store had noted that the percentage of its customers who use the store's credit card, the percentage of those who use a major credit card, and the percentage of those who pay cash are the same.During the Christmas rush, in a sample of 210 shoppers, 66 used the store's credit card; 63 used a major credit card; and 81 paid cash.With α = .05, test to see if the methods of payment have changed during the Christmas rush.

Accepted Answer

The answer of Before the rush began for Christmas shopping,...

Question 17

A population where each of its element is assigned to one and only one of several classes or categories is a _____ population.

Accepted Answer

A)  multinomial 
B)  Poisson 
C)  normal 
D)  binomial

Question 18

The number of degrees of freedom associated with the chi-square distribution in a test of independence is number of _____ minus 1.

Accepted Answer

A)  sample items 
B)  populations 
C)  rows minus 1 times number of columns 
D)  populations minus number of estimated parameters

Question 19

Shown below is 3 x 2 table with observed values from a sample of 1500.At the 5% level of significance, test for independence of the row and column factors.

Accepted Answer

The answer of Shown below is 3 x 2 table...

Question 20

An insurance company has gathered the following information regarding the number of accidents reported per day over a period of 100 days.  ​
Using the critical value approach, test to see if the above data have a Poisson distribution.Let α = .05.

Accepted Answer

The answer of An insurance company has gathered the following...

Exam 12: Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

The following table shows the number of individuals in a sample of 450 who indicated they support the new tax proposal. We are interested in determining whether or not the opinions of the individuals of the three groups are uniformly distributed.The expected frequency for each group is

A group of 500 individuals were asked to cast their votes regarding a particular issue of the Equal Rights Amendment.The following table shows the results of the votes: At α = .05 using the p-value approach, test to determine if the votes cast were independent of the sex of the individuals.

When individuals in a sample of 150 were asked whether or not they supported capital punishment, the following information was obtained. We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.The p-value is

From a poll of 800 television viewers, the following data have been accumulated as to their levels of education and their preference of television stations. Test at α = .05 to determine if the selection of a TV station is dependent upon the level of education.Use the p-value approach.

You want to test whether or not the following sample of 30 observations follows a normal distribution.The mean of the sample equals 11.83 and the standard deviation equals 4.53. The expected frequency in the 3rd interval is

The properties of a multinomial experiment include all of the following except

The number of categorical outcomes per trial for a multinomial probability distribution is

An important application of the chi-square distribution is

The personnel department of a large corporation reported sixty resignations during the last year.The following table groups these resignations according to the season during which they occurred: Test to see if the proportion of resignations is uniform over the four seasons. Let α = .05.

A population where each of its element is assigned to one and only one of several classes or categories is a _____ population.

The number of degrees of freedom associated with the chi-square distribution in a test of independence is number of _____ minus 1.

Shown below is 3 x 2 table with observed values from a sample of 1500.At the 5% level of significance, test for independence of the row and column factors.

An insurance company has gathered the following information regarding the number of accidents reported per day over a period of 100 days. Using the critical value approach, test to see if the above data have a Poisson distribution.Let α = .05.

Exam 12: Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

The following table shows the number of individuals in a sample of 450 who indicated they support the new tax proposal. ​ We are interested in determining whether or not the opinions of the individuals of the three groups are uniformly distributed.The expected frequency for each group is

A group of 500 individuals were asked to cast their votes regarding a particular issue of the Equal Rights Amendment.The following table shows the results of the votes: ​ At α = .05 using the p-value approach, test to determine if the votes cast were independent of the sex of the individuals.

When individuals in a sample of 150 were asked whether or not they supported capital punishment, the following information was obtained. ​ We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.The p-value is

From a poll of 800 television viewers, the following data have been accumulated as to their levels of education and their preference of television stations. ​ Test at α = .05 to determine if the selection of a TV station is dependent upon the level of education.Use the p-value approach.

You want to test whether or not the following sample of 30 observations follows a normal distribution.The mean of the sample equals 11.83 and the standard deviation equals 4.53. ​ The expected frequency in the 3rd interval is

The properties of a multinomial experiment include all of the following except​

The number of categorical outcomes per trial for a multinomial probability distribution is​

An important application of the chi-square distribution is

The personnel department of a large corporation reported sixty resignations during the last year.The following table groups these resignations according to the season during which they occurred: ​ Test to see if the proportion of resignations is uniform over the four seasons. Let α = .05.

A population where each of its element is assigned to one and only one of several classes or categories is a _____ population.

The number of degrees of freedom associated with the chi-square distribution in a test of independence is number of _____ minus 1.

Shown below is 3 x 2 table with observed values from a sample of 1500.At the 5% level of significance, test for independence of the row and column factors.

An insurance company has gathered the following information regarding the number of accidents reported per day over a period of 100 days. ​ Using the critical value approach, test to see if the above data have a Poisson distribution.Let α = .05.

The following table shows the number of individuals in a sample of 450 who indicated they support the new tax proposal. We are interested in determining whether or not the opinions of the individuals of the three groups are uniformly distributed.The expected frequency for each group is

A group of 500 individuals were asked to cast their votes regarding a particular issue of the Equal Rights Amendment.The following table shows the results of the votes: At α = .05 using the p-value approach, test to determine if the votes cast were independent of the sex of the individuals.

When individuals in a sample of 150 were asked whether or not they supported capital punishment, the following information was obtained. We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.The p-value is

From a poll of 800 television viewers, the following data have been accumulated as to their levels of education and their preference of television stations. Test at α = .05 to determine if the selection of a TV station is dependent upon the level of education.Use the p-value approach.

You want to test whether or not the following sample of 30 observations follows a normal distribution.The mean of the sample equals 11.83 and the standard deviation equals 4.53. The expected frequency in the 3rd interval is

The properties of a multinomial experiment include all of the following except

The number of categorical outcomes per trial for a multinomial probability distribution is

The personnel department of a large corporation reported sixty resignations during the last year.The following table groups these resignations according to the season during which they occurred: Test to see if the proportion of resignations is uniform over the four seasons. Let α = .05.

An insurance company has gathered the following information regarding the number of accidents reported per day over a period of 100 days. Using the critical value approach, test to see if the above data have a Poisson distribution.Let α = .05.