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Question: Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. A study was then done to see if the mean time has increased in the new century. A random sample of 26 first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was three years with a standard deviation of 1.8 years. Suppose that it is somehow known that the population standard deviation is 1.5. Conduct a hypothesis test to determine if the mean length of jail time has increased. Assume the distribution of the jail times is approximately normal.
1. Is this a test of means or proportions?
2. What symbol represents the random variable for this test?
3. In words, define the random variable for this test.
A person's body temperature is found to be 101.00 °F. Is the result unusual? Why or why not? What should you conclude? What body temperature is the 95th percentile?
Let pC be the true proportion of Champaign voters who support marijuana legalization and let pU be the true proportion of Urbana voters who support marijuana legalization. (a) Calculate the p-value for the test H0: pU=pC versus H1: pU≠pC.
Exponential distribution witha a mean value of 4 minutes. What is the probability that you will be served in less than three minutes on 4 of the next 6 days.
approximately what proportion of the area under a normal curve with mean ? and standard deviation ? falls to the right
Deductible with a $580 premium. (A $Y deductible means the insurance company pays X - Y for X >= Y and X for X
1. the labor relations manager of a large corporation wished to study the absenteeism among workers at the companys
in the united states the average weight of an adult male is 172 pounds with a standard deviation of 29 pounds. assuming
a. Determine the least-squares regression line and inter- pret its slope. b. Estimate, for a year during which 500,000 boats are sold, the number of boat trailers that would be sold. c. What reasons might explain why the number of boat trailers so..
If a household is chosen at random from this suburb, what is the probability that this household has not installed an electronic security system?
When considering the comfort and safety of the passenger which result is more relevant . the result from (a) or the probability from part (B) ? Pls explain why
Children toilet train (training age normally distributed) at an average of 26 months with a standard deviation of 2 months. How lilely is child to be trained after 30 months?
a multiple-choice test consists of 77 questions with possible answers of a b c d e. estimate the probability that with
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