A random sample of 10 waiters in Weston, West Virginia, revealed ...

[sjones]

A random sample of 10 waiters in Weston, West Virginia, revealed the following hourly earnings, including tips: 19, 18, 15, 16, 18, 17, 16, 18, 20, and 14 . (Units are dollars.)
 a. If the hourly earnings are normally distributed with a standard deviation of 4.50, estimate with 95 confidence the mean hourly earnings for all waitresses in Iowa City.
  b. Interpret your confidence interval.

Question 2

Multicollinearity affects the t-tests of the individual coefficients as well as the F-test in the analysis of variance for regression because the F-test combines the t-tests into a single test.
  Indicate whether the statement is true or false

[14vl19]

Answer to Question 1

a. LCL = 14.31 and UCL = 19.89.
b. Based on my sample, I estimate that the mean hourly earnings is between 14.31 and 19.89 . I am 95 confident that in repeated sampling, the population parameter would fall in the resulting interval.

Answer to Question 2

F

[sjones]

Gracias!

[ricroger]

Thanks for the timely response, appreciate it