A random sample from an unknown population had a sample standard ...

[cnetterville]

A random sample from an unknown population had a sample standard deviation of zero. Which one of the following is a reasonable conclusion?
 a. The sample range must be zero.
  b. An error was made in computing the sample standard deviation. It must always be greater than zero.
  c. The population standard deviation must be zero.
  d. The population standard deviation must be zero when the mean is zero.
  e. None of these.

Question 2

You have rejected the null hypothesis when it is false, and therefore you have made a
 a. Type A correct decision.
  b. Type B correct decision.
  c. Type I error.
  d. Type II error.

[zacnyjessica]

Answer to Question 1

A

Answer to Question 2

B

[cnetterville]

Wow, this really help

[Dominic]

Excellent