l. Assume cholesterol levels are normally distributed. The Chief Statistician for the Center for Disease Control takes a random sample of six females (ages 21-35) and obtains the following results: 189, 177, 188, 195, 183 and 179. All work must be shown. (10pts)
Please compute the following statistical indicators:
Arithmetic Mean: _
Median: _ Mode: _ Range: _ Variance: _
Standard Deviation: _
Set up a normal distribution model plus and minus three “z” values, showing the cholesterol levels of females (ages21-35).
2. A college admission director wishes to estimate the population mean age of all students currently enrolled. He takes a random sample of 57 students, the mean age is found to be 22.95 years. From past studies, the population standard deviation is known to be 5.55 years. Construct an eighty-five percent confidence interval of the population mean age. Assume the standard deviation is known; use “z” procedure). (5 points)
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