Professor Smith took a sample of 190 students from her morning class and a sample of 169 students from her evening class. On Exam 1, all those sampled from the morning class got a 68 while those sampled from the evening class averaged a 70 with a variance of 142. If Professor Smith combines these two samples.. Question 2 What is the combined Exam 1 average? 68.9415 Question 3A What is the combined Exam 1 median? Question 3BWha is the shape of the combined Exam 1 grade distribution? Question 4 What is the combined Exam 1 standard deviation?

Question

How to solve for question 2-4?

Professor Smith took a sample of 190 students from her morning class and a sample of 169 students from her evening class. On Exam 1, all those sampled
from the morning class got a 68 while those sampled from the evening class averaged a 70 with a variance of 142. If Professor Smith combines these two
samples..
Question 2
What is the combined Exam 1 average?
68.9415
Question 3A
What is the combined Exam 1 median?
Question 3BWha is the shape of the combined Exam 1 grade distribution?
Question 4
What is the combined Exam 1 standard deviation?

Image Transcription

Professor Smith took a sample of 190 students from her morning class and a sample of 169 students from her evening class. On Exam 1, all those sampled from the morning class got a 68 while those sampled from the evening class averaged a 70 with a variance of 142. If Professor Smith combines these two samples.. Question 2 What is the combined Exam 1 average? 68.9415 Question 3A What is the combined Exam 1 median? Question 3BWha is the shape of the combined Exam 1 grade distribution? Question 4 What is the combined Exam 1 standard deviation?

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