2. The Assignment 1 marks for several groups have come in and the group sizes, means and standard deviations for the groups are below. Group No. 1 23 Group Size (n) 10 8 12 Mean S.D. (x) (0) 75 4 89 2 81 6 Find the standard deviation and mean for the total cohort.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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answer the following please

2. The Assignment 1 marks for several groups
have come in and the group sizes, means and
standard deviations for the groups are below.
Group No.
1
2
3
Group Size
(n)
10
8
12
Mean S.D.
(x)
(0)
75
4
89
81
2
6
Find the standard deviation and mean for the
total cohort.
Transcribed Image Text:2. The Assignment 1 marks for several groups have come in and the group sizes, means and standard deviations for the groups are below. Group No. 1 2 3 Group Size (n) 10 8 12 Mean S.D. (x) (0) 75 4 89 81 2 6 Find the standard deviation and mean for the total cohort.
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