WageWeb (http://www.wageweb.com/health1 .htm) provides compensation information and services on more than 160 positions. As of October 1,
Question:
WageWeb (http://www.wageweb.com/health1
.htm) provides compensation information and services on more than 160 positions. As of October 1, 2003, the national average salary for a registered nurse (RN) was $47,858. Suppose the standard deviation is $7750.
a. Find the probability that the mean of a sample of 100 such nurses is less than $45,000.
b. Find the probability that the sample mean of a sample of 100 such nurses is between $46,000 and $48,000.
c. Find the probability that the sample mean of a sample of 100 such nurses is greater than
$50,000.
d. Explain why the assumption of normality about the distribution of wages was not involved in the solution to parts a–c.
Step by Step Answer:
Just The Essentials Of Elementary Statistics
ISBN: 9780495314875
10th Edition
Authors: Robert Johnson, Patricia Kuby