Question

(2 points) We consider the differences between the reading and writing scores of a random sample of 217 students who took the High School and Beyond Survey. The mean and standard deviation of the differences are x¯read−write=−0.59 and sread−write=8.553 points.
Note: although the sample size is large, please perform calculations using the t-distribution.

NOTE: A T Value must be computed and not found using t table.

Calculate a 91 % confidence interval for the average difference between the reading and writing scores of all students. (Give answers rounded to at least 2 decimal places.)

The lower level of the confidence interval is:  

The upper level of the confidence interval is:  

The confidence interval provides convincing evidence that there is a real difference between the average scores (enter either TRUE or FALSE):

Answer 1

Given had 8.553 -0.59-1-391 1.6829, 0.50 q İploes level: -1.69 MnsuoesTeUE