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On the first statistics exam, the coefficient of determination between the hours studied and the grade earned was 72%. The standard error of estimate was 8. There were 20 students in the class. Develop an ANOVA table for the regression analysis of hours studied as a predictor of the grade earned on the first statistics exam.
He (given that) the true proportion of perfect condition items is only 80% what is the probability that the lot will not be shipped?
(a) Compute the arithmetic mean of the subscribers' incomes. (b) Compute the modal and median incomes.
The number of viewers of American Idol has a mean of 29 million with a standard deviation of 5 million. Assume this distribution follows a normal distribution.
What percentage of items will weigh between 6.4 and 8.9 ounces?
When is it important to have matched pairs rather than two independent sets of data?
Below you are given a partial computer output based on a sample of 16 observations.
Compute a 3-month moving average forecast of demand for April through January (of the next year).
You own a stock called Insurate, Inc. Your profit for the stock is a random variable (W) with mean 1,000 and variance 400. You would like to buy more stock and you are trying to decide between Insurate
The estimated simple linear regression equation minimizes the sum of the squared deviations between each value of Y and the line.
Find out the suitable critical value(s) for this situation given a 0.05 significance level. Find out/compute the value of sample test statistic.
The standard deviation is estimated to be 0.279. Use the 99% level of confidence.
Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
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