A variable of two populations has a mean of 49 and a standard deviation of 14 for one of the populations and a mean of 54 and a standard deviation of 15 for the other population. a) For independent samples of sizes 34 and 45, respectively, find the mean and standard deviation of 1 — X2. mean: standard deviation: b) Can you conclude that the variable 1-2 is approximately normally distributed? (Answer yes or no) answer:

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A variable of two populations has a mean of 49 and a standard deviation of 14 for one of the populations and a mean of 54 and a standard deviation of
15 for the other population.
a) For independent samples of sizes 34 and 45, respectively, find the mean and standard deviation of ₁ - 2.
mean:
standard deviation:
b) Can you conclude that the variable 1 T2 is approximately normally distributed? (Answer yes or no)
answer:
Transcribed Image Text:A variable of two populations has a mean of 49 and a standard deviation of 14 for one of the populations and a mean of 54 and a standard deviation of 15 for the other population. a) For independent samples of sizes 34 and 45, respectively, find the mean and standard deviation of ₁ - 2. mean: standard deviation: b) Can you conclude that the variable 1 T2 is approximately normally distributed? (Answer yes or no) answer:
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