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It is known that 70% of adult workers have a high school diploma. If a random sample of 9 adult workers is selected, what is the probability that 4 or less of them have a high school diploma? (That is, find P(X4)) (keep 4 decimal places)
Use the normal distribution to approximate the desired probability. Find the probability that in 200 tosses of a fair die, we will obtain at exactly 30 faces.
The researchers gave each subject a battery of nine separate neurological and psychological examinations designed to assess their mental capabilities.
If a random sample of 81 students had a sample mean score of 74.6, find a 90 percent confidence interval estimate for the average score of all students.
Generate survival times X from an exponential distribution with rate lambda=1 with a censoring distribution C being exponential with rate theta = 2/3. Then Plot Kaplan-Meier Survival curve estimates along with true survival curve for n=25,100,1000..
Given that these are the top 10? salaries, do we know anything about the salaries of TV personalities in? general? Are such top 10 lists valuable for gaining in
Multiple regression equation relating expected travel cost (Y) number of days, (Y (x1) ) number of days on the road and distance traveled (X2).
Test the relevant hypotheses using a 5 .05. For purposes of this exercise, assume that it is reasonable to regard the sample
at a certain university the average attendance at basketball games has been 2825. this year the attendance for the
The manager fo the Petroco Service Station wants to forecast the demand for unleaded gasoline next month so that the proper number of gallons can be ordered from the distributor. Compute the two forecast by using MAPD and indicate which seems to be..
Calculate 95 percent and 99 percent confidence intervals for µ. (Round answers to 3 decimal places.) 95 percent confidence intervals for µ is
Provide a detailed explanation of what this test measures, and how it is similar to and different from the independent t-test and the chi-square test
a) What is the level of significance? b) What is the value of the sample test statistic? (Round your answer to three decimal places.) c) Find the P-value. (Round your answer to four decimal places.)
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