Question

We consider the differences between the reading and writing scores of a random sample of 200 students who took the High School and Beyond Survey. The mean and standard deviation of the differences are −0.556 and 8.871 points.
Requried:
a. Calculate a 95% confidence interval for the average difference between the reading and writing scores of all students.
b. Interpret this interval in context. (Round your answers to two decimal places.)

Answer 1

Answer:

A) True : Confidence Interval is the interval range around sample statistic, which is certain by extent of confidence level, to consist the actual population parameter.

B) True : Confidence Interval is the interval range around sample statistic, which is certain by extent of confidence level, to consist the actual population parameter.

C) False : Null Hypothesis can be accepted, despite of being actually false. This is called Type 2 Error.

Step-by-step explanation:

Hope this helps:)