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The mean score on a physical fitness test for Division I student-athletes is 947 with a standard deviation of 205. If you select a random sample of 60 of these students, what is the probability the mean is below 900?
Using α = 0.05, does this sample provide enough evidence to conclude that the average utility bill in Delaware was lower in the winter of 2011-2012 than it was in the winter of 2010-2011?
A dietitian investigated whether apples washed in hot water or in cold water turned brown at different rates when exposed to air. She took 13 random apples and cut each in half.
The statistic has a normal distribution with a standard deviation of 10 gallons. Find the probability that the family's monthly purchases will be between 86and 96 gallons.
Calculate the standard deviation of the number of available rooms in that sample. Use the central limit theorem to calculate and identify the sampling distribution of the sample mean.
A population of scores forms a normal distribution with a mean of 40 and a standard deviation of 12. What is the probability of randomly selecting a score less than x=34?
Suppose the credit center selects five cardholders at random. What is the probability that all five cardholders will pay their new monthly balance in full before the payment due date?
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Maximum change in length of BD must not exceed 0.001 times the length of ABC, determine the smallest-diameter rod that can he used for member BD.
q1. consider two lotteriesl1 0.5 1000 0.2500 0.2300 0.1 200 l2 0.6 800 0.1600 0.3 100a using an exponential utility
Medical tests were conducted to learn about drug-resistant tuberculosis. Of 142 cases tested in NJ, 9 were found to be drug-resistant. Of 268 cases tested in Tx, 5 were found to be drug-resistant.
My question bout How do I use the TINV function within excel to back out the t-statistic for the test? Why did you use the TDIST function? I know ho to use the TINV function, but what does it mean to back out the t-statistic for the test?
A random sample of 90 printers discovered that 25 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small buisnesses.
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