Suppose that a customer service center claims that the telephone calls it
receives last 112 seconds on average, with a standard deviation of 9
seconds. if you took a sample of 324 telephone calls, which of the following
mean times would be within the 95% confidence interval?

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18