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An IQ test is designed so that the mean is 100 and the standard deviation is 2424 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students...

Suppose 60% of the population approves of the job the governor is doing, and that 25 individuals are drawn at random from the population. Solve the following    a. what is the probability...

A sample of size 36 is taken. Population standard deviation is 3. Population mean is 8. Find the probability that the sample mean salls between 7.8 and 8.2

A shipment of 250 netbooks contains 3 defective units. Determine how many ways a vending company can buy three of these units and receive (a) no defective units. (b) all defective units. (c)...

For a t distribution with n = 17, find the area, or probability to the right of 2.120     0.05   0.025   0.105   none...

79% of teens own an iPod or other MP3 player. If the probability that both a teen and his or her parent own an iPod or other MP3 player is .43, what is the probability that both a teen and his or...

Identify the claim  A maker of frozen meals claim that the average caloric content of its meals Is not 400. The standard deviation is 15. A researcher tested 16 meals and found that the average...

When rolling dice - I have a number or a set of numbers in mind that I want the dice to total at the end of the roll. I already know that my number or set of numbers has a probability of "hitting"...

You are testing the claim of “The Big Cookie” Company that it puts 20 chocolate chips in its big cookies. Many consumers have complained that they have been short changed. Test the claim from the...

The lengths of turtles in a park are normally distributed with a mean of 21.6 inches and a standard deviation of 4.4 inches. What is the percentile rank of a turtle whose length is 17 inches?...