Joey participated in a standardized reading test. He scored in the middle of the third stanine in a normal distribution. All of the following are incorrect except:. a. His score was the median for the group that participated in the test. b. His t-score is 40.c. His score fell at +2 standard deviationd. His score fell at a z-score of -3.

b. His t-score is 40.

Step-by-step explanation:

The middle of the third stanine in a normal distribution means that the standard of nine that is applied has the middle of the third count.

It means that if we divide the normal distribution with the standard of nine we will find the score to be  the middle of the  third division.

So it will be (1/3*9=3) more than 3.

Which in normal distribution will be more than 30.

The t distribution is approximately normal when the number of degrees of freedom is greater than 30 .

So the best answer is that His t-score is 40  ( choice b).

the balance is found at the link

step-by-step explanation: