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A particular brand of dishwasher soap is sold in three sizes: 30 oz, 45 oz, and 65 oz. Twenty percent of all purchasers select a 30-oz box, 50% select a 45-oz box, and the remaining 30% choose a 65-oz box. Let X1 and X2 denote the package sizes selected by two independently selected purchasers.
(a) Determine the sampling distribution of X. x 30 37.5 45 47.5 55 65 p(x) Calculate E(X). E(X) = oz Compare E(X) to µ. E(X) > µ E(X) < µ E(X) = µ.
(b) Determine the sampling distribution of the sample variance S2. s2 0 112.5 200 612.5 p(s2) Calculate E(S2). E(S2) = Compare E(S2) to s2. E(S2) < s2 E(S2) = s2 E(S2) > s2.
Apply the problem discovery sample size formula to several finite populations. How should I integrate the finite population correction factor (FPC) into this formula?
Consider the following data on 20 chemical reactions, with Y = chromatographic retention time (seconds) and X = molecular weight (gm/mole).
Describe the advantages and disadvantages of quasi-experiments? What is the fundamental weakness of a quasi-experimental design? Why is it a weakness? Does its weakness always matter?
a a manufacturer of golf equipment wishes to estimate the number of left-handed golfers in the u.s. how large of a
Use the normal model to determine the probability that a wide receiver gained 325 yards or less in the 2006 season.
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Compute the Relative Risk of coronary artery disease in patients receiving the new medication as compared to placebo and compute the cumulative incidence of stroke in persons over 75 years of age
In order to do so, they review 42 service calls and construct a 95% confidence interval for population mean: (2.468, 2.743). What can we conclude about the significance test of Ho: mu = 2.6 vs Ha: mu does not equal 2.6?
Interpret the results. Is it possible that, for these populations of days, the average number of calls completed between plumber A and plumber B do not differ?
A university's administrator proposes to do an analysis of the proportion of graduates who have not fuond employment in their major field one year after graduation
Using the information provided, determine the optimal number of clerks to have on duty each Satyrday to minimize the store's total expected cost.
two cards are drawn from a well-shuffled deck.a what is the probability that they form a blackjack i.e. one is an ace
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