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Which of the following measurements do you think are likely to have a normal distribution: heights of college men, incomes of 40-year-old women, pulse rates of college athletes? Explain your reasoning for each variable.
For those variables that are likely to be normally distributed, give approximate values for the mean and standard deviation.
The times needed to fall asleep are assumed to follow a normal distribution. The results for the two nights for the ten volunteers are shown below:
Write the null and alternative hypotheses. You want to see if the number of minutes cell phone users use each month has changed from its mean of 120 minutes 2 years ago.
A 250-V shunt generator provides 5 kW to a certain load. The armature and ?eld resistances are respectively 0.5 and 200 Ω. Calculate the armature and ?eld currents, the electromotive force, and the torque required to move the generator, if it runs..
Generate a training sample of size 100 for each class, as well as a test sample of 5,000 per class. (Best to generate the centroids matrices per class once and store them).
For a randomly selected sample of 800 U.S. households, use the normal approximation to the binomial distribution in determining the probability that at least 420 of these households have a camcorder.
Determine if you would reject or fail to reject the null hypothesis in each of the following cases: (a) z=1.06 (b) z=2.06 (c) A z score beyond which 7% of the data fall in each tail.
Moving until all the nodes 1,2,......,m have been visited at least once. Starting at node 0, find the probability that node i is the last node visited, i=1,.....m.
according to the internal revenue service the mean tax refund for the year 2007 was 2708. assume the standard deviation
suppose that incoming lots are 0.5 nonconforming. what is the probability of rejecting these lots under both
let etwn. consider two time series models model a 11.3b0.65b2raised to the second power 0.325b3 1.625b4 0.05b5y t et
Mark VI monorail used at Disney world has a height of 72 in. Height of men are normally distributed with a mean of 69.5 in. And a standard deviation of 2.4 in.
A high school teacher correlated the math test scores and scores on a motivation scale for her 9th graders. She was delighted to find a high correlation between the two sets of scores. Later in the semester she correlated the math test scores of ..
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