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1. Let /(x) = 1/r, 1 x oo, zero elsewhere, be the p.d.f. of a random variable X. Consider a random sample of size 72 from the distribution having this p.d.f. Compute approximately the probability that more than 50 of the observations of the random sample are less than 3.
2. Forty-eight measurements are recorded to several decimal places. Each of these 48 numbers is rounded off to the nearest integer. The sum of the original 48 numbers is approximated by the sum of these integers. If we assume that the errors made by rounding off are i.i.d. and have uniform distributions over the interval (-!,!), compute approximately the probability that the sum of the integers is within 2 units of the true sum.
Regression line drawn as y = c + 1075x, when x was 2, and y was 239, given that y intercept was 11. Calculate the residual
Internet users age 12-17 in proportion who opposes ads? Solve manually and then by mega stat. Point to your decision rule, your hypotheses and statistical and management conclusions."
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.
the auto parts department of an automotive dealership sends out an average of 4.9 special orders daily.a what is the
a remote controlled undersea vehicle detects debris from a sunken craft at a rate of 60 pieces per hour. the time to
Test the hypothesis that the proportion of all student cell phone users in the United States who own a smartphone is 35%. Use the 5% level of significance and report your results.
suppose that 65 of all those who enroll at the university of iowa finish in 6 years. what is the probability that 5
Using historical records, the personnel manager of a plant has determined the probability distribution of X, the number of employees absent per day. Calculate the mean of the population.
What is the probability an advertising firm selected at random has either an income between $1 million and $20 million, or an income of $20 million or more?
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
A random sample of 15 Golden Retrievers has an average weight of 66 lb. The percentile rank of this sample is: A.85. B.10. C.90. D.80. E.93.
(A) Which test is the most appropriate to analyze these data, and why is that test most appropriate? (B) What are an appropriate null and alternative hypothesis for this statistical test?
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