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Find the value of E, the maximum error of estimate, for c=90, n=10 and s=3.5.

Decide if the events of A and B are mutually exclusive or not mutually exclusive. A die is rolled. A:) the result is a number greater than a 4. B:) The result is a number less than 4.

THe distribution of cholesterol levels in teenage boys is approximately normal with a mean of 170 and a standard deviation of 30. Levels above 200 warrant attention. What percentage of teenage boys have levels between 170 and 225?

The distribution of cholesterol levels in teenage boys is approximately normal with a mean of 170 and standard deviation of 30. Levels above 200 warrant attention. What percentage of teenage boys have levels between 170 and 225?

you are given that x is a random variable witha normal distribution. If mean is 28 and standard deviation is 7 find the probability that x falls in the interval (14 <x<42).

If the mean and the standard deviation of a continous random variable tht is normally distributed are 26 and 6, find an interval that contains 95% if the distribution.

A test consists of 10 multiple choice questions, each with five possible answers, on of which is correct. to pass the test a student must get 60% or better on the test. If a student randomly guesses, what is the probability that the student will pass the test?

assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children. Find the probability of exactly seven boys in ten births.