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a. Differences in age between husbands and wifes ( husband age minus wife age) of married couples have a distribution that approximately follows the normal curve with a mean of 1.5 years and a std of 2.1 years. negative differences indicate that the wife is older. approximately what percentage of marriages are wife older?
b. Give a value such that 40% of marriages have a larger age difference than this value. in other words, what is the 60th percentile of age difference.
select the variable for the number of miles traveled last month. conduct a test of hypothesis to determine whether the
The sample mean of the sampling distribution of a statistic is 6 and the standard error of the statistic is 1.03. What is the probability that xbar > 7.52?
For the normal distribution curve with mean of 19 and a standard deviation of 6, which range of the variable shows an area under the curve corresponding to a probability of approximately 99.7%?
the use of a tremendously large sample does not solve the question of quality for an estimator. what problems do you
What is the probability that exactly two eastbound trains will arrive in the first 24 minutes and exactly three eastbound trains will arrive in the first 36 minutes?
Now we would like to evaluate regression equation for X using Y as independent variable.
What is the monetary certainty equivalent for the following gamble: gain $130 with probability 0.4, lose $320 with probability 0.6.
Jackson County judges try thousands of cases per year. In an overwhelming majority of the cases disposed, the verdict stands as rendered. However, some cases are appealed, and of those appealed, some of the cases are reversed. Jackie Chan of The S..
In general how is the magnitude of the standard error of estimate related to the value of correlation?
discuss how the writers seem critical of modern culture, as they portray modern man as a self-conscious functionary who fears an acute loss of spirituality and identity, as well as the ability to achieve authenticity and happiness, overcome by the..
a study of 12000 able-bodied male students at the university of illinois found that their times for the mile run were
Determine the 95 percent confidence interval and the 95 percent prediction interval for the selling price of a home with 2,200 square feet.
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