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Uncle Henry has been having trouble keeping his weight constant. In fact, at the end of each week, he notices that his weight has changed by a random amount, uniformly distributed between ?0.5 and 0.5 pounds. Assuming that the weight change during any given week is independent of the weight change of any other week, find the probability that Uncle Henry will gain or lose more than 3 pounds in the next 50 weeks
Study whether systolic blood pressure varied by time
Given a normally distributed variable (x), if you know that for a value of x = 244 the z-score = 2.20, what is the probability of any x value being above 244?
Find the test statistic.
question 1an airline was interested in measuring the length of time customers have to wait in the queue prior to
Construct 90% and 95 % confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals.
Let X represent the number of tires with low air pressure on a randomly chosen car.
State a hypothesis.
1) The number of girls who attend a summer basketball camp has been recorded for the seven years the camp has been offered. Use exponential smoothing with a smoothing constant of .8 to forecast attendance for the eighth year. 75, 78, 75, 120, ..
Using graphical, numerical summary and interpretation
Carry out a validation study, an I/O psychologist is developing a regression equation from data collected from those hired two years ago.
Use decision analysis tools discussed in class to determine what action the firm should pursue in order to minimize expected loss; either manual analysis or software is acceptable. Please also calculate the minimum expected loss.
How should they use the information from the labs?
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