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Given the binomial distribution with n = 23 and p = 0.79, would the normal distribution provide the reasonable approximation? Why or why not?
Then estimate demand again with a weighted moving average in which sales in the most recent year are given a weight of 2 and sales in the other two years are each given a weight of 1.
Describe the given data show a seasonal effect using moving average method. Describe the data which show a seasonal effect.
In a pilot study, five kids are given several problems of each type to practice (and then tested on three problems), in one of the three Sequences: D-R-T, T-D-R, OR R-T-D.
Explain distribution of sample means (shape , Expected value , and standard error ) for samples of n=36 selected from population with a mean of m =100 and standard deviation of s=12.
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
Would the null hypothesis be accepted or rejected in this case?
Obtain the simple linear regression equation, then analyze the residuals by (a) constructing a histogram
According to a recent survey, the probability that a passengerfiles a complaint with the Department of Transportation about aparticular U.S. airline is .000014. Suppose 100,000 passengers whoflew with this particular airline are randomly contacted..
Given that Z is standard normal randam variable. Compute the value of Z if area between –Z and Z is 0.754:
Final scores averaged 66 for the treatment group; the SD was 21. For the control group, the figures were 59 and 20. What do you conclude?
A chance sample of 50 families revealed an average or median of $112,000 and a standard deviation of $40,000. What is the standard error of the average or median?
Obtain a test statistic and p-value. Interpret the results at = .01.
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