Which of the characteristics below distinguishes the t statistic ...

[Engineer]

Which of the characteristics below distinguishes the t statistic from the z statistic?
 
  a. the proportion of area beyond a particular positive t value is equal to the proportion of area below the corresponding negative t
  b. the z distribution has a mean of zero while the t distribution does not
  c. In the t distribution the area under the curve beyond a value of 1.96 is greater than that of the normal curve
  d. all of these

Question 2

In a t test, when the size of the sample is increased, the confidence interval _________.
 
  a. increases c. stays the same
  b. decreases d. changes shape

[Awesome]

Answer to Question 1

C

Answer to Question 2

B

[Engineer]

YES! Correct, THANKS for helping me on my review

[momolu]

Thanks for the timely response, appreciate it