A company claims that the standard deviation in their delivery ...

[jayhills49]

A company claims that the standard deviation in their delivery times is less than 5 days. A sample of 27 past customers was taken. The average delivery time in the sample was 14 days with a standard deviation of 4.5 days. At the 5 level of significance, test the company's claim. Use the critical value approach.

Question 2

Waiting line models describe the transient-period operating characteristics of a waiting line.
 a. True
  b. False
  Indicate whether the statement is true or false

[dominiqueenicolee]

Answer to Question 1

H0: 2  25
Ha: 2 < 25
chi-square = 21.06 > 15.379; do not reject H0

Answer to Question 2

FALSE

[jayhills49]

YES! Correct, THANKS for helping me on my review

[peter]

Thanks for the timely response, appreciate it