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In baseball, a "no-hitter" is a regulation 9-inning game in which the pitcher yields no hits to the opposing batters. Chance (Summer, 1994) reported on a study of no-hitters in Major League Baseball (MLB). The initial analysis focused on the total number of hits yielded per game per team for all 9-inning MLB games played between 1989 and 1993. The distribution of hits per 9-innings is approximately normal with a mean of 8.72 and a standard deviation of 1.10.
a) What percentage of 9-inning MLB games result in fewer than 6 hits?
b) Using your knowledge of the normal curve, explain precisely why, statistically, is a no-hitter considered an extremely rare occurrence in MLB.
What type of shape would you expect the histogram of the sample size to have? What value would you estimate for the mean of the histogram of sample means?
Using the menu systems, request descriptive statistics (mean, s.d. and variance) for both your original variables
Test of claim for the statement made for a given paired sample:
What is the total amount spent on consumer goods?
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots.
Determine the mean annual amount spent on household consumption per family with a sample of 100 families, an average amount of $8,000 spent, and if the population standard deviation is $500,
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
If Weight 1 is the weight (in pounds) of a random sample of five men who were accepted as models, and Weight 2 is the weight (in pounds) of a random sample of five men who were rejected as models, which of the following is the appropriate inferenc..
The following data provided by a coffee company are the roast time in minutes for five batches of coffee (x) and the resulting shrinkage in percent of the coffee weight(y).
Now he wants to know if there is a difference between the three formats. Is there?
A bank official reported the results of a regression analysis designed to predict the bank's charges (y), measured in dollars per month, for services rendered to local companies.
Explain what the coefficient of determination, R^2 (R-squared), measures. How is it related to the sample correlation coefficient?
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