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 2A 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
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