The mean and standard deviations of two samples of sizes 80 and 40 are
15 and 10; and 8 and 5 respectively. Calculate the standard deviation of the combined
sample.
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Answer:
The mean and standard deviations of two samples of sizes 80 and 40 are
15 and 10; and 8 and 5 respectively. Calculate the standard deviation of the combined
sample.
Step-by-step explanation:
.
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