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Cadbury, Inc., is interested in estimating people's responses to a new chocolate. The company believes that people in different age groups differ in their prefer- ences for chocolate. The company believes that in the region of interest, 25% of the population are children, 55% are young adults, and 20% are older people. A proportional allocation of a total random sample of size 1,000 is undertaken, and people's responses on a scale of 0 to 100 are solicited. The results are as follows. For the chil- dren, x = 90 and s = 5; for the young adults, x = 82 and s = 11; and for the older people, x = 88 and s = 6. Give a 95% con?dence interval for the population average rating for the new chocolate.
Find the percentage of men meeting those height requirements. Are too many men denied the opportunity to join the Marines because they are too short or too tall?
Four movies are randomly selected. Their lenghts were 110, 96, 125, and 136 minutes. Find a 95% confidence interval of the average of the lenghs of the movie.
question a researcher wishes to determine whether the average amount of bleaching agent in a 1kg packet of brand x
What signified to you on all of the problems that required a normal distribution that you were to use a normal distribution? Which problems required a normal distribution?
On January 1, 2014, Manor Inc. signed a 6-year noncancelable lease for a printing press. The terms of the lease called for Manor to make annual payments of $54,291 at the beginning of each year, starting January 1, 2014.
A multiple regression analysis includes 25 data points and 4 independent variables results in SST = 200 and SSR = 150. the multiple standard error of estimate will be?
What are the mean value and standard deviation of the number among these 15 that are from the second section? What are the mean value and standard deviation of the number of projects not among these first 15 that are from the second section?
A multicenter clinical trial involving 17,000 patients suspected of having acute myocardial infarction was conducted. The vascular death rate after 5 weeks was compared in patients receiving aspirin versus those not receiving aspirin
consider a string of bernoulli trials with probability of success equal to p and let y1 be the number of trials untial
Calculate s(k) for each natural number k from 1 through 15. Are the numbers SQRT(5), PI, and -6 in the domain of the function s? What is the domain of the function s?
Parametric tests (such as t or ANOVA) differ from nonparametric tests (such as chi-square) primarily in terms of the assumptions they require and the data they use. Explain these differences.
a candy maker produces mints that have label weight of 20 grams on each box. assume that the weight of a box of mints
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