Proportion of healthy people
With a mean of 74 and standard deviation of 16. What is the proportion of healthy people will have CBF readings between 60 and 80?
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Find a 95% CI on the mean foam height. Find a 95% prediction interval on the next bottle of shampoo that will be tested.
Suppose X and Y are continuous random variables with joint pdf f(x, y) = 24xy, 0 < x, 0 < y, and x + y < 1, and zero otherwise.
1. The maker of a shampoo knows that customers like this product to have a lot of foam. Ten sample bottles of the product are selected at random and the foam heights observed are as follows (in millimeters): 210, 215, 194, 195, 211, 201, 198,
Find the probability that the claim will be rejected assuming that the manufacturer's claim is true. Use the normal distribution to approximate the binomial distribution when possible.
Suppose a geyser has a mean time between eruptions of 94 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 24 minutes.
Suppose that you must establish regulations concerning the maximum number of people who can occupy an elevator. A study indicates that if eight people occupy the elevator, the probability distribution of the total weight of eight people is approxi
Because of nonresponse, the fraction of women among recipients of the survey could be anything between (low) __________ and (high) _________.
Which distribution is followed by Xbar? What are its parameters? (if you cannot give the parameter(s), then give point(s) estimate using the appropriate notation) Calculate the interval for 95% confidence on the mean of X? What is the interpretatio
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