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What's the line? You use the same bar of soap to shower each morning. The bar weighs 80 grams when it is new. Its weight goes down by 5 grams per day on the average. What is the equation of the regression line for predicting weight from days of use?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
Before 1918, in a random sample of 11 wolves spotted in the region, what is the probability that 8 or more were male?
We wish to compare the average sales in two shops, to see if the population mean of the first one is higher than the second one. One shop had 100 sales averaging $94, with a standard deviation of $40.
part a. dependent t testfor this assignment we are interested in finding out whether participation in a creative
Data is given in the table below. Process data as illustrate in the paper on the Mann-Whitney U test. Critical Value:Test Statistic (Show procedure.)Z .
Two of these students are to be randomly selected for inclusion on a university-wide student committee (by placing ?ve slips of paper in a bowl, mixing, and drawing out two of them). What are the 10 possible outcomes (simple events)?
A baseball player would like to conduct an experiment to determine how the weight of his bat, the speed of a pitch and the type of pitch affect the distance he can hit the ball in the air. The player will examine two different bat weights (32..
a family doctor is interested in examining the relationship between a patients age and total cholesterol. he randomly
Construct a 95% confidence interval for the true average amount of time customers spent in the restaurant. With a .95 probability, how large of a sample would have to be taken to provide a margin of error of 2.5 minutes or less?
question the joint probability function of two random discrete variables x and y with natural values not negative
For a normal distribution, find the z-score value that separate the middle 90% of the distribution from the 10% in the tails.
a random sample of 70 voters found that 40 were going to vote for a certain candidate. find the 99 limit for the
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