Author Question: A random sample of 49 statistics examinations was taken. The average score, in the sample, was 84 ... (Read 116 times)

serike · **on:** Jun 24, 2018

A random sample of 49 statistics examinations was taken. The average score, in the sample, was 84 with a variance of 12.25 . The 95 confidence interval for the average examination score of the population of the examinations is
a. 80.48 to 87.52.
b. 77.40 to 86.60.
c. 82.99 to 85.01.
d. 68.00 to 100.00.

Question 2

Statistical methods that generally require very few, if any, assumptions about the population distribution are known as
a. parametric methods.
b. nonparametric methods.
c. free methods.
d. distribution-fixed methods.