A particular test is often used for measuring depression in ...

[waynest]

A particular test is often used for measuring depression in adults. Scores range from 0 to 50 with higher scores indicating greater depression. Let X represent the score on this test for healthy young adults. Such scores have a normal distribution with a mean of 20 and a standard deviation of 6. This test is administered to a random sample
   of 4 healthy young adults.
 
   What is the shape of the sampling
   distribution of the sample mean
   score for the 4 healthy young adults?

  1.normal
  2.t distribution with 3 degrees of freedom
  3.uniform over the range of 0 to 50

Question 2

A particular test is often used for measuring depression in adults. Scores range from 0 to 50 with higher scores indicating greater depression. Let X represent the score on this test for healthy young adults. Such scores have a normal distribution with a mean of 20 and a standard deviation of 6. This test is
   administered to a random sample
   of 4 healthy young adults.
 
   What is the standard deviation
   of the sampling distribution of
   the sample mean score for the
   4 healthy young adults?

  1.6
  2.1.5
  3.3

[choc0chan]

Answer to Question 1

1

Answer to Question 2

3

[waynest]

Thanks for the timely response, appreciate it

[xiazhe]

Wow, this really help