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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.
questionthe table below gives the quarterly enrollment in a major american business college for the period
consider the following hypothesis test.h0 u1-u2 0ha u1-u2 not equal to 0the following results are for two independent
Auto pistons at Yongpin Zhou's plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. Construct the 3-sigma x-chart and the 3-sigma R-shart for this dimension, using the data observed in ..
Normally distributed about a mean value of 580 with a standard deviation of 60. Determine what percentage of the students scored higher than 750 on the exam.
Using smoothing constant of w = .80, compute the value of exponentially smoothed series in 1983.
At the 0.05 level of significance, is there evidence that the population mean amount of spending is different from $250 per trimester on textbooks
Use a bag of M&M TM candies and perform an examploe Chi-squared analysis based on your random sampling(s). State a hypothesis and a few reasons why it along with your Chi-squared analysis may be different from someone else's findings.
Absenteeism is distributed evenly throughout the week. The 0.01 level is to be used. The sample results are:
What is the probability that of today's 1,300 callers at least 5 received a busy signal? Use the poisson approximation to the binomial.
A student passes the test if his/her grade is larger than or equal the passing grade. What score should she set as the lowest passing grade?
A random sample of 20 single men was asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that:
levine inc. is considering an investment that has an expected return of 15 and a standard deviation of 10. what is the
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