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When people get married for the first time, the husband is, on average, 2 years older than the wife. The standard deviation of the difference in age is roughly 2.5 years. Suppose it is reasonable to assume that the distribution of the difference in age between the husband and the wife is normal. Twelve recently married couples (all first marriages) are to be selected and the average difference in age is to be calculated.
What is the probability that the average age of the wives in the sample is older than the average age of the husbands?
the mock data file consists of 3 columns each containing 1000 numbers1. a flag indicating which data row2. the sampled
Working with a small group of colleagues, develop a consensus view of private car sales in Western Europe in five years time. In order to do this you will need.
TASER International, Inc., develops, manufactures, and sells nonlethal self-defense devices known as tasers. Marketing primarily to law enforcement.
the probability that an american ceo can transact business in a foreign language is 20. 10 american ceos are chosen at
a. Was playing on a sports team independent of race and gender group? b. What was the overall probability of a high school student playing on a sports team?
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
consider two random variables with standard deviations equal to 1.5 and 2.1. the standard deviation of the average of
by studying the grade distributions in calculus over several years it was determined that the probability of a student
A mean of 68 years and a standard deviation of 3.5 years. Find the age at which payments have ceased for approximately 86% of the plan participants.
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
Figure shows histograms of the student responses, in scrambled order and without scale markings. Which histogram goes with each variable?
An analyst within a company computes a project's NPV from the shareholders' perspective. In evaluating the project, the analyst uses the company's 12 percent.
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