____________________ is a condition that exists when independent variables are correlated with one another.
Fill in the blank(s) with correct word
Q. 2Which of the following statements is false regarding the sample size needed to estimate a population mean?
a. It is directly proportional to the population variance.
b. It is directly proportional to the square of z / 2.
c. It is directly proportional to the square of the maximum allowable error B.
d. None of these choices.
Q. 3If a group of independent variables are not significant individually but are significant as a group at a specified level of significance, this is most likely due to:
a. heteroscedasticity.
b. an error in the analysis.
c. multicollinearity.
d. None of these choices.
Q. 4When determining the sample size necessary for estimating the true population mean, which factor is not of our concern when sampling with replacement?
a. The allowable or tolerable sampling error.
b. The level of confidence desired in the estimate.
c. The population standard deviation.
d. The population size.
Q. 5If multicollinearity exists among the independent variables included in a multiple regression model, then:
a. the regression coefficients will be difficult to interpret.
b. the standard errors of the regression coefficients for the correlated independent variables will increase.
c. one or more of the coefficients may have the wrong sign.
d. All of these choices are true.
Q. 6In determining the sample size n needed to estimate the population mean, n is higher if the population standard deviation is higher.
Indicate whether the statement is true or false
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