Biology Forums - Study Force

Let's assume there are sophomores, juniors, and seniors in your marketing research class and we want to know if their average GPAs differ. What is the proper statistical test?
 a. t-test
  b. z-test
  c. Chi-square test
  d. ANOVA
  e. None of the above.

Question 2

When a computed z-value (for a test for differences between two percentages), say 4.51, is larger than the standard z-value, say 1.96, then this amounts to
 a. support for the null hypothesis; the two percentages are different.
  b. no support for the null hypothesis; the two percentages are not different.
  c. support for the null hypothesis, the two percentages is not different.
  d. no support for the null hypothesis; the two percentages are different.
  e. None of the above.

Question 3

In which of the following situations would it be useful to test for differences between two groups?
 a. A retailer wishes to know if customer satisfaction is different between in-store v. online shoppers.
  b. A beverage company wants to know if a new beverage concept differs between users v. nonusers of the current brand.
  c. A department store wishes to know the differences between online catalogs vs. mail order catalog shoppers.
  d. A state university ants to know is there is a significant difference in GPA between undergraduate and graduate students.
  e. All of the above situations would benefit from tests for differences between two groups.

Question 4

Multiple regression analysis is useful when there are __________ independent variable(s) and __________ dependent variable(s).
 a. more than one, one
  b. one, more than one
  c. more than one, more than one
  d. one, one
  e. None of the above.

Question 5

When independent variables in a multiple regression equation are highly correlated among themselves, it indicates the existence of __________. The statistics used to measure if this exists is called VIF.
 a. unstandardized coefficients
  b. standardized coefficients
  c. multicollinearity
  d. standard error
  e. standard deviation

Question 6

Which statistical technique should you use when you are attempting to answer the question: Is there a significant relationship between the customers' disposable income (measured in dollars) and their repeat-buying behavior (measured by the number of rebuys in a twelve-month period)?
 a. Multiple regression analysis
  b. Chi-Square test
  c. Simple regression analysis
  d. Pearson correlation coefficient
  e. None of the above.

Question 7

A research study involving the research question: On the basis of a survey of husband-wife households, is there a significant difference between the mean attitude score of husbands and that of wives toward our product? will involve a
 a. test for a single proportion.
  b. test of two means when samples are independent.
  c. test for a single mean.
  d. test of two means when samples are dependent.
  e. None of the above.

Question 8

If an organization selects two towns for a market study (one for the test and the other as a control) and measures the amount of trash in pounds per household, it must first determine the equality of the two towns using a
 a. test of a single proportion.
  b. test of a single mean.
  c. test of two means.
  d. test of two proportions.
  e. None of the above.

Answer to #1

D

Answer to #2

D

Answer to #3

E

Answer to #4

a

Answer to #5

C

Answer to #6

D

Answer to #7

D

Answer to #8

C