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A GMAC MBA new-matriculants survey provided the following data for 2018 students. Given that a person applied to more than one school, what is the probability that the person is 24-26 years old (to 2 decimals)? Given that a person is in the 36-and-over age group, what is the probability that the person applied to more than one school (to 4 decimals)? What is the probability that a person is 24-26 years old or applied to more than one school (to 4 decimals)? Suppose a person is known to have applied to only one school. What is the probability that the person is 31 or more years old (to 4 decimals)? Is the number of schools applied to independent of age?
In a recent year, 11th grade New York public school students taking an English test produced test scores that were normally distributed with a mean of 81 and a standard deviation of 6. Let x be a random variable that represents a test score.
A bus arrives at a bus stop at a uniformly distributed time over the interval 0 to 1 hour. A passenger also arrives at the bus stop at a uniformly distributed time over the interval 0 to 1 hour.
Use a 0.01 significance level to test the claim that flights scheduled one day in advance cost more than flights scheduled 30 days in advance.
Ace Machine Works estimates that the probability its lathe tool is properly adjusted is 0.8. When the lathe is properly adjusted, there is a 0.9 probability that the parts produced pass inspection.
q1. explain the difference between multiple independent variables and multiple levels of independent variables. which
A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal?
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How large a sample is needed to find the population mean within $250 at 99 percent confidence?
a researcher wants to perform a study to estimate mean body temperature of adults. a pilot study resulted i a mean of
Heights of men on a baseball team have a bell-shaped distribution with a mean of 177cm and a standard deviation of 5cm. Using the empirical rule, what is the approximate percentage of the men between the following values?
the weights in pounds of discarded plastic from a sample of households summary statistics are n62 x1.911 s1.065 use a
If mean height when these plants are treated with the certain chemical varies from 185. Define the null hypothesis H0 and alternative hypothesis H1 which we would use for this test.
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