When 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.
Question 2
If 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.
Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,
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