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A newspaper article reported that people spend a mean of 6.5 hours per day watching TV, with a standard deviation of 2.1 hours. A psychologist would like to conduct interviews with the 20% of the population who spend the most time watching TV. She assumes that the daily time people spend watching TV is normally distributed. At least how many hours of daily TV watching are necessary for a person to be eligible for the interview? Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
Consider these data as random samples from two independent normal populations; carry out an appropriate test to con?rm or refute the hypothesis that instrument 2 is less precise than instrument 1.
sometimes the geometric random variable is defined to be the number of trials x preceding the first success. write down
Find out the probability distribution of blood types by gender in the group of 1000 individuals.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
The riskless return is currently 6%, and Chicago Gear has estimated the contingent returns given here. Calculate the expected returns on the stock market and on Chicago Gear stock. What is Chicago Gear's beta?
problemprovide me a half page response to each of the following two discussion posts. tell me what you agree with
How many different ways to be appointed head of a division How many different ways could the three new heads be appointed?
let x be normally distributed random variable with mean u and variance s2 4.84. determine the the size of the sample
A product used in a laboratory of the hospital costs $60 to order, and its carrying cost per item per week is one cent. Demand for the item is six hundred units weekly. The lead time is three weeks and the purchase price is $0.60. What is the econ..
one person has 3 dollars to gamble each time he uses only one dollar the probability is 60 to lose and 40 to win. if he
Find a 99% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? (Round your answers to one decimal place.)
thirty percent of american parents allow their children under age 13 to stay home alone after school. source united
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