The Distribution of GPA Scores Is Known to Be Left

The distribution of GPA scores is known to be left skewed.At a large university,an English professor is interested in learning about the average GPA score of the English majors and minors.A simple random sample of 75 junior and senior English majors and minors results in an average GPA score of 2.97.Assume that the distribution of GPA scores for all English majors and minors at this university is also left skewed with a standard deviation of 0.62.Calculate a 95% confidence interval for the mean GPA of the junior and senior English majors and minors.

A) (2.786,3.154)
B) (2.830,3.110)
C) (2.852,3.088)
D) (2.954,2.986)