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Imagine that a sample of 400 rental units shows that (i) the distribution of rents paid per month is not described by a normal distribution,
(ii) that the mean rent of the sample is $755, and (iii) the standard deviation of the sample is $100.
a) Without seeing the distribution, can you calculate the probability that the rent of a randomly selected unit will be greater than $800? If yes, calculate the probability; if no, explain.
b) Without seeing the distribution, can you calculate the probability that the mean rent of another sample of 400 units will be greater than $800? If yes, calculate the probability; if no, explain.
c) Why is the answer to (b) only an estimate? (What two numbers about the entire population are you not sure of?)
Tuddenham and Snyder obtained the following results for 66 California boysat ages 6 and 18 (the scatter diagram is football-shaped): average height at 6 ˜ 3 feet 10 inches, SD˜1.7
what is the electric field at point x if q=7*10^-6 C d=6m
Quartiles and Percentiles Percentile can be explained as : a measure this tells us what is the percent of the total frequency scored at or below the measure. Quartiles
Study A Study B r = .64 r = .77 df = 18 df = 121 p 1. In using the data from study A to m
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examples
The Rohr Company''s old equipment for making subassemblies is worn out. The company is considering two alternatives: a) Completely replacing the old equipment with new equipment
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Course of Study MBA 10% B.Tech 90% BBA 0% Diploma 0% Annual College Fee 25,000-30,000 0% 40,000-50,000 10% 85,000-90,000 90% 90,000 Above 0% Taken an Education Loan Yes 100
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