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A boy has a height of 4 feet4 feet~122cm and 4 inches4 inches~11cm at age 8. According to current height charts, the mean height at this age is 4 feet 2 inches4 feet 2 inches~128cm, with standard deviation of 3 inches3 inches~8cm. What is this boy's height in percentile rankings? - how would I work out this problem on my own?
Does Caffeine Enhance the Taste of Cola?- Soft drink manufacturers claim that caffeine enhances the flavor of cola drinks and that this is why they make caffeinated colas.
Find that 116 plan to renew their subscriptions. Use (a=0.01). p = the population of subscribers to Golf Illustrated who renew. Calculate the p-value.
Children's gross motor development is assessed with an overall motor quotient, MQ, which was found to follow an approximate normal distribution for a large
Using at least one example from the reading, explain how this gender expectation impacted American culture during the Jeffersonian period.
Define a critical region that has a significance level of a = 0.05. If the random sample of n = 30 yielded = 3189 and s = 488, what is your conclusion? What is the approximate p-value of your test?
a let x have t-distribution with 29 degrees of freedom. what is the distribution of x2?b let x and y be normal.what is
Express the null hypothesis and the alternative hypothesis in symbolic form. An entomologist writes an article in a scientific journal which claims.
a computer help desk is provided by gregory. some of the callers need assistance with hardware and other with software.
test 1perform the following two-tailed hypothesis test using a .05 significance levelintrinsic by genderstate the null
A recent study of the laundry habits of Americans included the time in minutes of the wash cycle. A sample of 40 observations follows. Determine the mean and the median of a typical wash cycle.
A manufacturer of car batteries claims that his batteries will last, on average, 3 years with a variance of 1 year. If 5 of these batteries have lifetimes of 1.9, 2.4, 3.0, 3.5, and 4.2 years
test the research hypothesis at the .01 level
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