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In the first five games of the season, the Twins scored the following numbers of runs: Y1 = 2, Y2 = 8, Y3 = 2, Y4 = 5, Y5 = 8. From this distribution, compute the following and fill in the blanks.
What is the Z-score for Y1
What is the Z-score for Y2
A random sample of 221 homes in Kentucky found that 115 were heated by natural gas. Does the evidence support the claim for Kentucky at the a = 0.05 level.
Redo the calculations for the significance test and the confidence interval under the following assumptions, and summarize the effects of the sample sizes on the results.
Construct a 3 × 3 table of counts where there is no apparent association between the row and column variables.
A random sample of 13 four-cylinder cars is obtained and the breaking distances are measured and found to have a mean of 137.5 ft and a standard deviation of 5.8 ft.
a hospital has three identical generators one on-line and other two in standby. in the primary failure mode which is
4th graders in the US take a standardized test for math. The national average score is 237. Did your state, as represented by your students, out perform the national average using a statistically significant measure?
The mean of a normal distribution probability is 400 pounds. The standard deviation is 10. What is the area between 415 pounds and the mean of 400 pounds? (Round to 4 decimals)
Recently, an automobile insurance company performed a study of a random sample of 16 of its customers to determine if there is a positive relationship.
If the lifetime of A is exponentially distributed with a mean 200 hours and the lifetime of B is exponentially distributed with a mean of 400 hours
The Dean of your school has asked you to organize and present data from a one-question (one-variable) survey to determine students' satisfaction in the social work program. There are 220 students in the program: 55 of them (25 percent) were random..
When using the normal distribution (empirical rule) to obtain the bounds for a 99.73 percent of the values in a population, the interval generall will be _________________ the interval obtained for the same percentage if Chebyshev's theorem is ass..
The daily price of coffee is approximately normally distributed over a period of 15 days with a mean in April 2007 of $1.35 per pound.
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