This test has a time limit of 2 hour. This test will save and submit when the ti

Question

This test has a time limit of 2 hour. This test will save and submit when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds Multiple Attempts This test allows 2 attempts. This is attempt number 1. Force Once started, this test must be completed in one sitting. Do not leave the test before clicking save and submit. The waist measurement of students in a college is normally distributed the standard deviation is known to be five inches. It is found that 20% of the students have waist inches. What is the mean waist of students? 28.0 29.5 32.2 35.3 26.5

Explanation / Answer

Solution:

C) 32.2

For 20% of the left area of normal distribution curve, z-value = -0.84

xbar = mean + z*sigma
28 = mean -0.84 * 5
mean = 28 + 4.2
mean = 32.2

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