Reference no: EM132166929
In a study of speed? dating, male subjects were asked to rate the attractiveness of their female? dates, and a sample of the results is listed below ?(1equals=not ?attractive; 10equals=extremely ?attractive). Construct a confidence interval using a 95?% confidence level. What do the results tell about the mean attractiveness ratings of the population of all adult? females?
5?, 7?, 1?, 9?, 4?, 5?, 6, 9?, 8?, 9?, 3?, 9
What is the confidence interval for the population mean μ??
Listed below are the amounts of net worth? (in millions of? dollars) of the ten wealthiest celebrities in a country. Construct a 95?% confidence interval. What does the result tell us about the population of all? celebrities? Do the data appear to be from a normally distributed population as? required?
263
196
181
169
160
159
151
151
151
146
What is the confidence interval estimate of the population mean μ??
Listed below are student evaluation ratings of? courses, where a rating of 5 is for? "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 98?% confidence level. What does the confidence interval tell about the population of all college students in the? state?
3.5, 2.9?, 3.7?, 4.8?, 3.1?, 4.1?, 3.2?, 4.4?, 4.5?, 4.4?, 4.1?, 3.9?, 3.6?, 3.7?, 3.5
What is the confidence interval for the population mean μ??
An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90?% confidence that the sample mean is within 7 IQ points of the true mean. Assume that σ=10 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.
The required sample size is ________________?