confidence interval for difference between two means A study was conducted to determine if the salaries of elementary school teachers from two neighboring districts were equal. A sample of 16 teachers from each district was randomly selected. The mean from the first district was $29,000 with a standard deviation of $2500 (Sample 1). The mean from the second district was $30,000 with a standard deviation of $2100 (Sample 2). Assume the samples are random and independent, and the populations are normally distributed. Answer the following questions. What is SE for the difference in the two means? Answer out of possible choices. a. 350.28 b. 730.07 c. 816.24 d. 1659.04 Using the answer from the previous question and df = 29, what is a 95% confidence interval to estimate the difference in mean salary (µ1- µ2)? Answer out of possible choices. a. (-2491.99,492.99) b. (492.99, 2491.99) c. (669.21, 2669.21) d. (-2669.21, 669.21)
A study was conducted to determine if the salaries of elementary school teachers from two neighboring districts were equal. A sample of 16 teachers from each district was randomly selected. The mean from the first district was $29,000 with a standard deviation of $2500 (Sample 1). The mean from the second district was $30,000 with a standard deviation of $2100 (Sample 2). Assume the samples are random and independent, and the populations are
What is SE for the difference in the two means? Answer out of possible choices.
a. 350.28
b. 730.07
c. 816.24
d. 1659.04
Using the answer from the previous question and df = 29, what is a 95% confidence
a. (-2491.99,492.99)
b. (492.99, 2491.99)
c. (669.21, 2669.21)
d. (-2669.21, 669.21)
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