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The time taken to do minor check-ups on small cars is found to be normally distributed with a mean time of 30 minutes and a standard deviation of 5 minutes. What is the time limit for checking a car if no more than 10% of checks exceed this limit?
Suppose a baseball pitcher throws fastballs 80% of the time and curveballs 20% of the time. Suppose a batter hits a home run on 8% of all fastball pitches
Lefties. Assume that 13% of people are left-handed. If we select 5 people at random, find the probability of each outcome described below.
Generate a 95% confidence interval for the difference in mean numbers of cups of coffee consumed between men and women.
What are confounds? Give an example of a design that has three confounds. Describe three ways to alter the design to address these confounds and explain the advantages and disadvantages of each.
the average flight from point a to point b takes 100 minutes with a standard deviation of 10 minutes.a. what is the
to test the hypothesis h0 ? 100 vs. h1 ? gt 100 a z-score of 2.8 is calculated. the value of 2.8 isa the test
Example, was about the relationship between hormone therapy and invasive breast cancer. One of the results reported in the paper was.
The difference between the certain equivalent of a deal with free clairvoyance and the certain equivalent of that deal without the clairvoyance represents.
a manufacturer knows that their items have a normally distributed lifespan with a mean of 3.1 years and standard
Prove that a and b are coprime if and only if no prime numbers divides both a and b. Show that [a,m] = m if and only if a divides m
A person born in 1964 is equally likely to live for any (not necessarily integer) number of years between 1 and 100. find the conditional probability P(T >80|T>50)
suppose a committee of 3 people is to be selected randomly from a group consisting of 4 men and 5 women. what is the
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