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A certain type of digital camera comes in either a 3-megapixel version or a 4-megapixel version. A camera store has received a shipment of 18 of these cameras, of which 7 have 3-megapixel resolution. Suppose that 5 of these cameras are randomly selected to be stored behind the counter, the other 13 are placed in a storeroom Let X = the number of 3-megapixel cameras among the 5 selected for behind the counter storage.
(a) Compute P(X = 3).
(b) Compute P(X > 3).
(c) Calculate the mean of X.
(d) Calculate the standard deviation of X.
assume that there are nine parking spaces next to one another in a parking lot. nine cards need to be parked by an
You are running a one-sided test of H0: μ = μ0, where q is the appropriate quantile/critical bound. (Note: q may be positive or negative, depending on the test.) Do you reject H0 if H1: μ > μ0 and t > q?
a polling company reported that 14 of 2286 surveyed adults said that they play baseball. complete the followingwhat is
heres the question suppose that in a certain population of married couples 30 of the husbands smoke 20 of the wives
probability of 0.31 that it is dominant. There is also a probability of 0.22 that a gene is type B and it is dominant. What is the probability that a gene is of type A?
As a condition of employment, Fashion Industries applicants must pass a drug test. Of the last 220 applicants 14 failed the test. Develop a 99 percent confidence interval for the proportion of applicants that fail the test. Would it be reasonable ..
Suppose that among all participants, the mean test score is 70.07 and the standard deviation is 10.27. Use z-scores to interpret a raw score of 80. What is the corresponding z-score? How would you interpret this result? Show your work.
Construct the 90% and 99% confidence interval for population mean. Which interval is wider? If convenient, utilize technology to construct confidence intervals.
suppose heights of adults measured in inches are normally distributed with mean 70 inches and standard deviation 10
If 8 kids within this age group who use the Internet are randomly chosen, what is the probability that 2 of them do their schoolwork on line? What is the probability that no more than 5 of them do their schoolwork on line?
If 20 voters are selected at random, and X is the number of voters which support this referendum, determine the mean and variance of X.
Estimate the true proportion of college students who believe in the possibility of haunted places with 99% confidence. According to Time magazine, 37% of americans believe that places can be haunted.
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