Question 1

What determines the decision of whether to use a one-tailed test or a two-tailed test when testing hypotheses to make inferences about a population mean?

Accepted Answer

A)  the sample size and the estimated standard error
B)  the nature of the situation and what the researcher is trying to demonstrate
C)  the level of significance of the test
D)  the sample size relative to the population size
E)  the standard error relative to the sample variance B

Question 2

Which of the following is the first step in hypothesis testing?

Accepted Answer

A)  calculating the value of the test statistic
B)  stating the hypothesis
C)  choosing the appropriate test statistic
D)  stating the conclusion
E)  developing a decision rule B

Question 3

The chi-square test is a test to determine whether the difference
between two proportions is greater than would be expected because of sampling
error.

Accepted Answer

A) True 
 B)False  True

Question 4

Researchers very rarely know the population mean.

Accepted Answer

A) True 
 B)False

Question 5

A market researcher is trying to determine whether males differ from females with regard to the following question: Do you drink soft drinks? Which of the following tests would be most appropriate?

Accepted Answer

A)  chi-square test
B)  1-way AVOVA test
C)  correlation analysis
D)  median test
E)  Kolmogorov-Smirnov Test

Question 6

In testing a hypothesis about means,if the sample size was less than 30,then the appropriate statistical test would be?

Accepted Answer

A)  chi-square test
B)  t-test
C)  z-test
D)  one-way ANOVA
E)  cross-tabulation

Question 7

Suppose in our sample results we find that males average drinking five soft drinks per week,compared with six soft drinks per week for females.In the absence of additional analysis,what type of difference has been illustrated?

Accepted Answer

A)  statistical difference
B)  managerially important difference
C)  a difference of dispersion
D)  mathematical difference
E)  none of these

Question 8

If the alternative hypothesis is supported,the researcher concludes there are significant differences in the phenomenon being measured.

Accepted Answer

A) True 
 B)False

Question 9

A consultant has a random sample of 400 usable responses in a database.Included are the following questions: Household Income Category: $ \begin{array}{ll}\text { (1) } \$ 0 \text { to } \$ 24,999 & \text { (2) } \$ 25,000 \text { to } \$ 49,999\end{array} $ (3) $ \$ 50,000 $ to $ \$ 99,999 $ (4) $ \$ 100,000 $ and over Average Weekly Soft Drink Consumption:ـ___________________ The consultant wants to determine if there are any statistically significant differences in average weekly soft drink consumption by income category.What statistical test should be applied to give the consultant the information he needs?

Accepted Answer

The answer of A consultant has a random sample of...

Question 10

Distinguish between a Type I error and Type II error.What is the relationship between the two?

Accepted Answer

The answer of Distinguish between a Type I error and...

Question 11

In a beer consumption study,a researcher makes an assumption that males will consume more beer per week than females; this can be stated in a:

Accepted Answer

A)  research objective.
B)  given level of significance.
C)  hypothesis.
D)  theory.
E)  rule.

Question 12

In most statistical software packages,the t-test is often substituted for which test statistic?

Accepted Answer

A)  chi-square test
B)  f-test
C)  z-test
D)  one-way ANOVA
E)  cross-tabulation

Question 13

ANOVA is a statistical technique that permits the researcher to determine whether the variability among or across the independent sample means is greater than expected because of sampling error.

Accepted Answer

A) True 
 B)False

Question 14

The z-test would be appropriate for testing three or more proportions when the sample size is less than 30.

Accepted Answer

A) True 
 B)False

Question 15

The exact probability of getting a computed test statistic that was largely due to chance is referred to as the______________.

Accepted Answer

A)  p-value
B)  chi-square value
C)  z-test value
D)  median value
E)  t-test value

Question 16

In related samples,the measurement of the variable of interest has no influence on the measurement of the variable in another sample.

Accepted Answer

A) True 
 B)False

Question 17

A Type I error involves rejecting the null hypothesis when it is,in fact,true.

Accepted Answer

A) True 
 B)False

Question 18

The hypothesis of the status quo is typically referred to as the ______________ hypothesis.

Accepted Answer

A)  type III
B)  alternative
C)  statistical
D)  null
E)  valid

Question 19

In marketing research,the basic motive for making statistical inferences is to generalize from sample results to population characteristics.

Accepted Answer

A) True 
 B)False

Question 20

In testing a hypothesis from a random sample involving three or more means,the appropriate test would be a one-way ANOVA.

Accepted Answer

A) True 
 B)False

Exam 16: Statistical Testing of Differences and Relationships

What determines the decision of whether to use a one-tailed test or a two-tailed test when testing hypotheses to make inferences about a population mean?

Which of the following is the first step in hypothesis testing?

The chi-square test is a test to determine whether the difference between two proportions is greater than would be expected because of sampling error.

Researchers very rarely know the population mean.

A market researcher is trying to determine whether males differ from females with regard to the following question: Do you drink soft drinks? Which of the following tests would be most appropriate?

In testing a hypothesis about means,if the sample size was less than 30,then the appropriate statistical test would be?

Suppose in our sample results we find that males average drinking five soft drinks per week,compared with six soft drinks per week for females.In the absence of additional analysis,what type of difference has been illustrated?

If the alternative hypothesis is supported,the researcher concludes there are significant differences in the phenomenon being measured.

Distinguish between a Type I error and Type II error.What is the relationship between the two?

In a beer consumption study,a researcher makes an assumption that males will consume more beer per week than females; this can be stated in a:

In most statistical software packages,the t-test is often substituted for which test statistic?

ANOVA is a statistical technique that permits the researcher to determine whether the variability among or across the independent sample means is greater than expected because of sampling error.

The z-test would be appropriate for testing three or more proportions when the sample size is less than 30.

The exact probability of getting a computed test statistic that was largely due to chance is referred to as the______________.

In related samples,the measurement of the variable of interest has no influence on the measurement of the variable in another sample.

A Type I error involves rejecting the null hypothesis when it is,in fact,true.

The hypothesis of the status quo is typically referred to as the ______________ hypothesis.

In marketing research,the basic motive for making statistical inferences is to generalize from sample results to population characteristics.

In testing a hypothesis from a random sample involving three or more means,the appropriate test would be a one-way ANOVA.