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icang [17]
3 years ago
14

A researcher wishes to determine the difference in two population means. To do this, she randomly samples 9 items from each popu

lation and computes a 90% confidence interval. The sample from the first population produces a mean of 780 with a standard deviation of 240. The sample from the second population produces a mean of 890 with a standard deviation of 280. Assume that the values are normally distributed in each population. The point estimate for the difference in the means of these two populations is _______.
Social Studies
1 answer:
Rudik [331]3 years ago
5 0

Answer:

-110

Explanation:

The point estimate has been indicated which represents the difference between the mean of the first population and that of the second population.

Hence, point estimate = mean of the first population - mean of the second population

                                     =  780 - 890

                                     = -110  

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