3. a. A sample of 38 students from a community college reveals the average number of...

3. a. A sample of 38 students from a community college reveals the average number of units they are taking is 11.5, with a standard deviation of 1.4. Determine a 98% confidence interval for the true mean. b. Assume now that the same results occurred from a sample of size 9, but it was known that the original population was normal. c. Repeat problem 3a, assuming that the standard deviation was the real population standard deviation.

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orchestra answered 2 years ago

In a simple random sample of 51 community college statistics students, the mean number of college...

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2. A simple random sample of 1oo community college students was selected from alarge community college....

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The age distribution of students at a community college is given below. Age (years) Number of Students (f) Under 21 416 21-25 420 26-30 219 31-35 51 Over 35 24 Total = 1130 Number of students (f) 416 420 219 51 24 1130 A student from the community college is selected at random. Find the conditional probability that the student is at most 35 given that he or she is at least 26.

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3. The population of male students at Gallup (NM) Community College have a men height of 67.5 inches. It is claimed that male students who try out for the basketball team are taller than the general population of male students. To test this claim a sample of n= 36 male students who try out for the basketball team have a mean height of 68.3 inches and a standard deviation of 2.8 inches. Test this claim at the 90 and 99%...

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