The Internal Revenue Service is studying contributions to charity. The mean calculated from a random sample of 36 returns is $150. Assume that the population standard deviation is known and equal to $20. Construct a 98 percent confidence interval for the population mean.

3 answers

Formula:

CI98 = mean + or - z (sd/√n)

mean = 150; sd = 20; n = 36
Find z using a z-table to represent 98% confidence.

I'll let you take it from here.
what is answer
The Internal Revenue Service is studying contributions to charity. The mean calculated from a random sample of 36 returns is $150. Assume that the population standard deviation is known and equal to $20. Construct a 98 percent confidence interval for the population mean.
Similar Questions
    1. answers icon 3 answers
  1. What does the IRS stand for?(1 point) Responses Internal Revenue Service Internal Revenue Service International Revenue Service
    1. answers icon 1 answer
  2. Executive Department and Positions Quick Check3 of 53 of 5 Items Question Identify which of the following is a key independent
    1. answers icon 1 answer
    1. answers icon 1 answer
more similar questions