Answer Happy

Question 1 1 pt 1 Details The weights in a random sample of 32 Centerville men appeared to be normally distributed with a mean of 185 pounds and a standard deviation of 6 pounds. The weights in a random sample of 28 Statsburgh men appeared to be normally distributed with a mean of 191 pounds and a standard deviation of 8 pounds. How many degrees of freedom do we use in constructing a 90% confidence interval for the difference between the mean weight of all Centerville men and the mean weight of all Statsburgh men? 59 27 13 31 1 pt 1 Details The IQ scores from a random sample of 40 students at Statsburgh Middle School had mean 92 and standard deviation 9. The IQ scores from a random sample of 35 students at Centerville Middle School had mean 96 and standard deviation 7. What number is at the center of a 95% confidence interval for the difference between the mean IQ score for all SMS students and the mean IQ score for all CMS students? 94 2 4 2.032 1 pt 91 Details In a sample of 33 female students at Eastern Elite University, the mean height was 63.5 inches, with standard deviation 1.8 inches. In a sample of 37 male students at Eastern Elite University, the mean height was 69.2 inches, with standard deviation 2.6 inches. We use these numbers to construct a 90% confidence interval for Mi - M2. What does the symbol pi stand for? the sample mean in population 1, which is 63.5 inches the mean height of all female EEU students the number of female EEU students who are taller than 63.5 inches the difference between the heights of the male and female students in the samples