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From the records a random sample of 67 requests for makeup exams were selected. Of these...

From the records a random sample of 67 requests for makeup exams were selected. Of these requests, only 9 were granted. Find a 95% confidence interval for the proportion of requested makeup exams that could be granted in the future.

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Let x represents white blood cell count per cubic millimeter of whole blood. Assume that x has a distribution that is approximately normal with mean µ = 7500 and standard deviation σ = 1750. A test result of x < 3500 is an indication of leukopenia. This indicates bone marrow depression that may be the result of a viral infection. a) What is the probability that on a single test x is less than 3500? b) Suppose that a doctor uses the average x for two tests taken about a week apart.What is the probability of x < 3500 ?

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math   Statistics-And-Probability   
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、0.1343 poportion malce 67 = ( 0.0525,. 0,2159 lees than 3500 35003500-500 f (zぐ2, 2852 a50 0.0111 9309 3500-1500

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