Question
Find the mean and variance for the data
92 | 93 | 97 | 98 | 102 | 104 | 109 | |
3 | 2 | 3 | 2 | 6 | 3 | 3 |
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Text solutionVerified
The data is obtained in tabular form as follows
Here , ,
and Variance
92 | 3 | 276 | -8 | 64 | 192 |
93 | 2 | 186 | -7 | 49 | 98 |
97 | 3 | 291 | -3 | 9 | 27 |
98 | 2 | 196 | -2 | 4 | 8 |
102 | 6 | 612 | 2 | 4 | 24 |
104 | 3 | 312 | 4 | 16 | 48 |
109 | 3 | 327 | 9 | 81 | 243 |
109 | 3 | 327 | 9 | 81 | 243 |
22 | 2200 | 640 |
and Variance
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Question 2
For two data sets, each of size 5, the variances are given to be 4 and 5 and the corresponding means are given to be 2 and 4, respectively. The variance of the combined data set isStuck on the question or explanation?
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Question Text | Find the mean and variance for the data |
Answer Type | Text solution:1 |
Upvotes | 150 |