Question

Mrs. Smith has taught three, Algebra I classes this year. She just finished grading her final chapter test for the second semester. The raw data is below:
Class A Class B Class C
80 72 100
85 90 90
87 85 94
92 84 100
86 91 75
90 78 30
94 94 94
100 86 72
75 82 85
45 78 87
85 86 42
38 78 100
72 95 90
94 90 94
62 88 60

Question 1

Analyze the data for Class A and Class B.

Part 1: What is the mean and standard deviation for Classes A and B?

Answer 1

when it says find the mean for classes a and b does that mean both of them together or separate?

Answer 2

togehter

Answer 3

i got 82.06666667

Answer 4

@brhiannon

Answer 5

never mind try it apart

Answer 6

for A i got 79 and B 85.1333

Answer 7

http://www.mathsisfun.com/data/standard-deviation.html
have you tried and looked at this?

Answer 8

but the 85.1333 doesn't look right...