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Suppose we are testing the null hypothesis ho=20 and the alternative ha does not 20 for a normal population with a standard deviation of 6. A random sample of nine observations are drawn from the population, and we find the sample mean of these observations is x bar =17. What is the p value?
Our sample size is 17. Which value most accurately represents the critical value of Z that you would use to plug in for your interval?
Illustrate out the term control chart? Critically discuss the grand mean, the UCL and the LCL of a control chart for the mean?
Fairfield Homes is developing two parcels near Pigeon Fork, Tennessee. In order to test different advertising approaches, they use different media to reach potential buyers.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
the mean and standard deviation on a calculus mid term are 66 and 19 points while they are 72 and 15 on the final. if a
Fred received the following scores for his gymnastics routine: 8.5, 7.8, 8.0, 6.8, 7.1, 7.6. To figure out his score, the judges drop the highest and lowest score and then average the rest of his scores.
Mr. Smith had 11 stocks that averaged 11.3 percent with a standard deviation of 3.2 percent. At the .02 level of significance, can we conclude that Mr. Jones' stocks have a different variation?
the number of monthly breakdowns of a computer is a random variable having poisson distribution with lambda1.8. use
ten good coins are tossed simultaneously.find the probability of obtaining four heads.use the binomial distribution to
Using the empirical rule, what is the approx percentage of cans of regular coke with weights between 0.80931 lbs. and 0.82433 lbs?
when a truckload of apples arrives at a packing plant a random sample of 175 is selected and examined for bruises
bob wishes to insure a priceless family heirloom against theft. the annual premium for policy a is 150 and it will pay
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