# Professor Smith took a sample of 210 students from her morning class and a sample of 163 students from her evening class. On Exam 1, all those sampled from the morning class got a 67 while those sampled from the evening class averaged a 67 with a variance of 127. If Professor Smith combines these two samples.What is the combined Exam 1 Average?What is the combined Exam 1 median?What is the combined Exam 1 Standard Deviation?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Question

Professor Smith took a sample of 210 students from her morning class and a sample of 163 students from her evening class. On Exam 1, all those sampled from the morning class got a 67 while those sampled from the evening class averaged a 67 with a variance of 127. If Professor Smith combines these two samples.

What is the combined Exam 1 Average?
What is the combined Exam 1 median?
What is the combined Exam 1 Standard Deviation?

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