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Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee drinks per day follows a normal distribution.
a) What proportion drink 2 cups per day or more?
b) What proportion drink no more than 4 cups per day?
c) If the top 5% of coffee drinkers are considered heavy coffee drinkers, what is the minimum number of cups consumed by a heavy coffee drinker? ( hint: find the 95th percentile.)
The machine will stop working if more than three components fail. Find the probability that the machine will be working.
If Kim expects to use phone for 21 hours per month, which plan must she choose?
The impact of campaign film on attitudes toward a political candidate was investigated. Prior to showing the film, the attitudes of 15 people toward the candidate were assessed using a political likability scale.
Simulate a completely random process of length 48 with independent, t-distributed values each with 5 degrees of freedom. Construct the time series plot. Does it look "random" and nonnormal? Repeat this exercise several times with a new simulation ..
Explain the terms parameter and statistics. Make sure the concepts of population and sample are included in the definitions.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.500 inches.
Which of the following statements is true regarding a nonparametric test? We assume that the data has been chosen from a normally distributed population
Create a mixed integer programming model for this problem.
A silver dollar is flipped twice. Calculate the probability of each of the following occurring:
At the 0.05 level of significance, can we conclude Middletown students remained in their districts less time than Brockton students? Make use of 5-step hypothesis testing procedure.
Twenty three percent of automobiles are not covered by insurance. On a particular weekend, 35 automobiles are involved in accident.
If a single test is run and indicates that oil is present, what is the revised probability that oil is actually present?
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