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Four different paints are advertised as having the same drying time. To check the manufacturer's claims, five samples were tested for each of the paints. The time in minutes until the paint was dry enough for a second coat to be applied was recorded. The following data were obtained....
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I have questions about the experimental design course (Education Psychology 508), home assignment I need the answers, how can get them?
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Airline seats
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a sample of 100 students is selected from a known population of 1000 students to construct a 95%confidence interval for teh average SAT score. What correction factor should be used to compute the standard error?
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Dear my tutor I need your help in solving this question related to statistics and probability. The attached files include the question and the data that you need.
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If one can is randomly selected, find the probability that the amount of the cola is (1) at least 12.0 oz. (2) between 11.9 oz and 12.1 oz. (3) less than 11.9 oz.
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2. For a population with a mean of 60 and a standard deviation of 24, find the z-score corresponding to each of the following samples. a. M= 63 for a sample of n= 16 scores z=.5 b. M=63 for a sample of n= 36 scores z=.75 c. M= 63 for a sample of n= 64 scores z=1 My question is what is Om for...
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Perform the five-step hypothesis test on the data. "There is no significant difference in the price among the bedroom of houses.
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Assume the weight, W, of a randomly selected adult has a normal distribution with a mean of 175 pounds and a standard deviation of 10 pounds.. Find the probability, P(W < 190), that a randomly selected adult weighs less than 190 pounds.
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95% confidence; n = 51; x bar = 240; s = 242
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- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
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