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A sample of data has a standard deviation of 98. If you were to multiply all of the scores in the data set by factor of 43, what would the new standard deviation be?
you need to estimate the mean number of travel days per year for outside salespeople. the mean of a small pilot study
For this assignment, you will undertake an analysis based on a self-designed fictitious study that utilizes statistical methodologies. You will first develop a fictitious problem to examine - it can be anything. For example, maybe you want to look..
you are picking a bouquet of 20 flowers for your mother at random from a garden with 25 coneflowers 35 daisies and 42
the weights in pounds of discarded plastic from a sample of households summary statistics are n62 x1.911 s1.065 use a
Random sample of round-trip discount fares on this route last month gives: At .01 significance level can we conclude that mean fare has increased? Determine the p-value?
Let A ⊆ {1, 2, 3, . . . , 25} where |A| = 9. For any subset of A let sB denote the sum of the elements in B. Prove that there are distinct subsets C, D of A such that |C| = |D| = 5 and sC = sD.
a food processor specifies the mean weight of a product as 200 g. a random sample of 20 has a mean of 195 g and a
Find the probability that Marys total worth reaches $3000 at some point. (We assume here that Mary has to quit playing if she goes bankrupt so this is a gamblers ruin problem.)
For a constant matrix A and a Random vector z, E(Az)=AE(z), var (Az)=A var(z) AT under the Gauss-Markov conditions, determine the mean vector and the variance-co-variance matrix for the vector y-bar?( in terms of X, β, σ2)
a drug tester claims that a drug cures a rare skin disease 84 of the time. the claim is checked by testing the drug on
(a) In an attempt to determine if students prefer bottled water to tap water, you set up a table in the cafeteria at lunchtime and have students sample some of each and ask them which they prefer. (b) Researchers collect data over 15 years about 10..
A survey on the drinking habits of Americans estimated the percentage of adults across the country who drink beer, wine, or hard liquor at least occasionally. Of the 1516 adults interviewed, 985 said that they drank.
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