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The time, in minutes, it takes to install a certain software package is a continuous variable with the density.
f(x) = {4x^3 if 0<x<1{0 otherwise
a. Find the expected installation time
b. Find the standard deviation of the installation time.
Paul has calculated the indifference probability for the lottery having a payoff of $160K with probability p and -$80K with probability (1-p) as follows:
To compare the effectiveness of two treatments 1 and 2 for a particular disease. Patients were separated in 2 treatment groups. A patient in group 1 received treatment 1 and patients in group 2 received treatment 2.
1. of 1906 people who came into a blood bank to give blood 300 people had high blood pressure. estimate the probability
Let's further suppose that there was good interrater reliability on these frequency counts of behaviours and that they are interval/ratio level of measure, normally distributed, and independent observations.
the weekly salaries of teachers in one state are normally distributed with the mean of 490 and a standard deviation of
Jose scores 842 on the SAT. Assuming that both tests measure the same thing, what score on the ACT is equivalent to Jose's SAT score?
Assumed to have 20 pounds of carry-on baggage, find the probability that his total is greater than 195 pounds. Round your answer to three decimal places.
A citrus company is interested in evaluating the performance of two orange juice extractors, A and B. It is believed that both the size and the variety of the fruit yield in the test may influence the yields (percentage juice by weight) obtained f..
A company requires its secretarial employees to demonstrate his/her ability to type more than 45 words per minute in a typing test.
A survey of undergraduate students in the School of Business at Northern University revealed the following regarding the gender and majors of the students:
Testing for population proportion - evidence that the proportion of data processing clerks who have gone through the new training and are no longer employed is less than .25?
Poisson distribution with a mean of 8.8 tickets per day. Find the probability that less than six tickets are written in one hour given that the police works for 12 hours.
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