A quality analyst conducts a small-scale study to compare the average capacity of two brands of AA batteries (A and B). A random sample of 10 batteries of Brand A has an average capacity of 1065 mAh (milliampere-hours), and an independent random sample of 10 batteries of Brand B has an average capacity of 994 mAh. The sample standard deviations are 23.6 mAh and 38.0 mAh, respectively. It is assumed that battery capacity is normally distributed for both brands and the two distributions have the same variance. Find the upper limit of a 95% confidence interval for the difference between the population means. Form the confidence interval around a positive point estimate for the difference between the means. In order to obtain a positive point estimate, make sure you subtract the lower value from the higher value when calculating the difference between the sample means. (Provide your answer as a number rounded to the nearest integer.)
A quality analyst conducts a small-scale study to compare the average capacity of two brands of AA batteries (A and B). A random sample of 10 batteries of Brand A has an average capacity of 1065 mAh (milliampere-hours), and an independent random sample of 10 batteries of Brand B has an average capacity of 994 mAh. The sample standard deviations are 23.6 mAh and 38.0 mAh, respectively. It is assumed that battery capacity is
Find the upper limit of a 95% confidence interval for the difference between the population means.
Form the confidence interval around a positive point estimate for the difference between the means. In order to obtain a positive point estimate, make sure you subtract the lower value from the higher value when calculating the difference between the sample means.
(Provide your answer as a number rounded to the nearest integer.)
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