Question 1

The expected frequency for the cell in row i and column j is the row i total plus the row j total,all divided by n.

Accepted Answer

A) True 
 B)False

Question 2

For comparing two or more populations each having two or more categories,you can use which test(s)?

Accepted Answer

You can use a chi-sq

Question 3

The number of degrees of freedom associated with the chi-squared test for normality is the number of intervals used minus the number of parameters estimated from the data.

Accepted Answer

A) True 
 B)False

Question 4

In the test of a contingency table,the observed cell frequencies must satisfy the rule of 5.

Accepted Answer

A) True 
 B)False

Question 5

In a test of a contingency table,rejecting the null hypothesis concludes the variables are not independent.

Accepted Answer

A) True 
 B)False

Question 6

In a goodness-of-fit test,the null hypothesis states that the data came from a normally distributed population.The researcher estimated the population mean and population standard deviation from a sample of 200 observations.In addition,the researcher used 5 standardized intervals to test for normality.Using a 10% level of significance,the critical value for this test is 4.60517.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is not a characteristic of a multinomial experiment?

Accepted Answer

A)  The experiment consists of a fixed number of trials. 
B)  The outcome of each trial is classified into one of two possible categories. 
C)  The probability pi that the outcome will fall into cell i remains constant for each trial. 
D)  Each trial of the experiment is independent of the other trials. 
A)  The experiment consists of a fixed number of trials. 
B)  The outcome of each trial is classified into one of two possible categories. 
C)  The probability pi that the outcome will fall into cell i remains constant for each trial. 
D)  Each trial of the experiment is independent of the other trials.

Question 8

What are the two critical factors in identifying the technique used when the data are nominal?

Accepted Answer

The first is the problem objec

Question 9

Consumer panel preferences for three proposed Cafes are as follows:
 $$\begin{array} { | c | c | c | } 
\hline \text { Cafe A } & \text { Cafe B } & \text { Cafe C } \
\hline 48 & 62 & 40 \
\hline
\end{array}$$ Use 0.05 level of significance and test to see if there is a preference among the three Cafes,according to the data.

Accepted Answer

H₀: p₁ = p_2</

Question 10

To determine whether data were drawn from a multinomial distribution with certain proportions,you use a:

Accepted Answer

A)  chi-squared goodness-of-fit test. 
B)  chi-squared test of a contingency table. 
C)  chi-squared test for normality. 
D)  None of these choices. 
A)  chi-squared goodness-of-fit test. 
B)  chi-squared test of a contingency table. 
C)  chi-squared test for normality. 
D)  None of these choices.

Question 11

The number of ATVs sold by three salespersons over a 3-month period is shown below:
 $$\begin{array}{l}
\quad\quad\quad\quad\quad\quad\quad\quad\text { Brand of ATV }\
\begin{array} { | l | c c c | } 
\hline \text {Salesperson } & \text { Brand } \mathrm { A } & \text { Brand } \mathrm { B } & \text { Brand } \mathrm { C } \
\hline \text { Juan } & 7 & 2 & 6 \
\text { pedro } & 11 & 4 & \mathbf { 8 } \
\text { Fernando } & \mathbf { 8 } & 5 & 3 \
\hline
\end{array}
\end{array}$$ Use the 5% level of significance and test for the independence of salesperson and type of product sold.

Accepted Answer

H₀: Salesperson and brand of

Question 12

If the observed frequencies are all smaller than the expected frequencies in a goodness-of-fit test,the chi-squared test statistic will be negative.

Accepted Answer

A) True 
 B)False

Question 13

In a goodness-of-fit test,the null hypothesis states that the data came from a normally distributed population.The researcher estimated the population mean and population standard deviation from a sample of 500 observations.In addition,the researcher used 6 standardized intervals to test for normality.Using a 5% level of significance,the critical value for this test is:

Accepted Answer

A)  11.1433 
B)  9.3484 
C)  7.8147 
D)  9.4877 
A)  11.1433 
B)  9.3484 
C)  7.8147 
D)  9.4877

Question 14

The number of degrees of freedom associated with a chi-squared test of a contingency table is ____________________.

Accepted Answer

(r-1)(c-1)

Question 15

Contingency tables are used in:

Accepted Answer

A)  testing independence of two samples. 
B)  testing dependence in matched pairs. 
C)  testing independence of two qualitative variables in a population. 
D)  describing a single population. 
A)  testing independence of two samples. 
B)  testing dependence in matched pairs. 
C)  testing independence of two qualitative variables in a population. 
D)  describing a single population.

Question 16

When k = 2 the ____________________ experiment is identical to the ____________________ experiment.

Accepted Answer

multinomia

Question 17

A left tail area in the chi-squared distribution equals .99.For df = 8,the table value equals:

Accepted Answer

A)  20.090 
B)  3.4895 
C)  2.7326 
D)  15.5073 
A)  20.090 
B)  3.4895 
C)  2.7326 
D)  15.5073

Question 18

If we square the value of z (the test statistic in the test of a proportion)we produce the ____________________ statistic.

Accepted Answer

chi-square

Question 19

The owner of a consumer products company asked a random sample of employees how they felt about the work they were doing.The following table gives a breakdown of their responses by age.Is there sufficient evidence to conclude that the level of job satisfaction is related to age? Use $\alpha$ = .10.
 $$\begin{array}{l}
\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Rosponse }\
\begin{array} { l | c c c | } 
\hline \text { Age } & \text { Very Interesting } & \text { Fairly Interestine } & \text { Nat Interesting } \
\hline \text { Under 30 } & 31 & 24 & 13 \
\text { Between 30 and 50 } & 42 & 30 & 4 \
\text { Over 50 } & 32 & 21 & 3 \
\hline
\end{array}
\end{array}$$

Accepted Answer

H₀: Job satisfaction and age

Question 20

The chi-squared test of a contingency table is based upon:

Accepted Answer

A)  one quantitative variable. 
B)  two quantitative variables. 
C)  one qualitative variable. 
D)  two qualitative variables. 
A)  one quantitative variable. 
B)  two quantitative variables. 
C)  one qualitative variable. 
D)  two qualitative variables.

Exam 15: Chi-Squared Tests

The expected frequency for the cell in row i and column j is the row i total plus the row j total,all divided by n.

For comparing two or more populations each having two or more categories,you can use which test(s)?

The number of degrees of freedom associated with the chi-squared test for normality is the number of intervals used minus the number of parameters estimated from the data.

In the test of a contingency table,the observed cell frequencies must satisfy the rule of 5.

In a test of a contingency table,rejecting the null hypothesis concludes the variables are not independent.

Which of the following is not a characteristic of a multinomial experiment?

What are the two critical factors in identifying the technique used when the data are nominal?

Consumer panel preferences for three proposed Cafes are as follows: Cafe A Cafe B Cafe C 48 62 40 Use 0.05 level of significance and test to see if there is a preference among the three Cafes,according to the data.

To determine whether data were drawn from a multinomial distribution with certain proportions,you use a:

The number of ATVs sold by three salespersons over a 3-month period is shown below: Brand of ATV Salesperson Brand Brand Brand Juan 7 2 6 pedro 11 4 Fernando 5 3 Use the 5% level of significance and test for the independence of salesperson and type of product sold.

If the observed frequencies are all smaller than the expected frequencies in a goodness-of-fit test,the chi-squared test statistic will be negative.

The number of degrees of freedom associated with a chi-squared test of a contingency table is ____________________.

Contingency tables are used in:

When k = 2 the ____________________ experiment is identical to the ____________________ experiment.

A left tail area in the chi-squared distribution equals .99.For df = 8,the table value equals:

If we square the value of z (the test statistic in the test of a proportion)we produce the ____________________ statistic.

The chi-squared test of a contingency table is based upon:

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

A: Numerical Descriptive Techniques

B: Numerical Descriptive Techniques

C: Numerical Descriptive Techniques

Data Collection and Sampling

Probability

A: Random Variables and Discrete Probability Distributions

B: Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

A: Simple Linear Regression and Correlation

B: Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analysis and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

When k = 2 the experiment is identical to the experiment.