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What additional information is obtained from measurements on an interval scale compared to measurements on an ordinal scale?
70 people received a higher score on the second test, 13 a lower score, and 1 received the same score. At the 0.05 significance level, test the claim that the music has no effect on memorization skills.
Great Plains Roofing and Siding Company inc, sells roofing and siding products to home repair retailers, such as Lowe's and Home Depot, and commercial contractors.
A confidence interval estimate for the population mean is given to be (41.16, 49.85). If the standard deviation is 16.290 and the sample size is 54, answer each of the following (show all work):
Would you conclude that your data set is approximately normal? If so, what percentage of your data values lie:
the producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. a random sample
To get a C in history, Nandan must average 74 on four tests. Scores on the first three tests were 69, 74, and 65. What is the lowest score that Nandan can get on the last test and still receive a C?
what are the probability of you having the disease?
The quality control engineer for a furniture manufacturer is interested in the mean amount of force necessary to produce cracks in stressed oak furniture.
If an auditor takes a random sample of 36 accounts what is the probability that the mean balance will be less than 45?
Suppose a friend of a friend claimed to have ESP and agreed to sit just on time and guess at 100 cards. Suppose she made 36 matches. Calculate the probability of this many, or more, matches if only chance is at work, and carefully write a conclusion.
in a study conducted to investigate browsing activity by shoppers each shopper was initially classified as a in a study
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
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