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Create the indicated confidence interval for population mean using (a) t-distribution. (b) If you had incorrectly used normal distribution, which interval would be wider?
c=0.99, x=14.8, s=4.0, n=5
(a) 99% confidence interval using the t-distribution is ( ), ( ).
(b) If you had incorrectly used the normal distribution, which interval would be wider?
Calculate GM's Altman Z-Score. Show your calculations. Based on your calculations, would you agree or disagree with Lutz that GM is over the worst? Explain in detail.
Determine the probability that number of requests in 10 hour work day is between 68 and 80 inclusive? Give your answer to four decimal places.
To find out the efficiency of the current ticket operation, Mike wishes to examine several queue operating features.
In a distribution of scores, the arithmetic mean is 51, the median is 55, and the mode is 62. What is the score, in percentile form, of a subject who does less well than two-thirds of the sample?
Researchers routinely choose an alpha level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower alpha level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)?
Compute the value of t. What is your decision regarding the null hypothesis? Briefly summarize your results.
Adriana Corporation manufactures football equipment. In planning for next year, the managers want to understand the relation between activity and overhead costs.
One state lottery has 300 prizes of $1, 65 prizes of $10, 18 prizes of $75, 6 prizes of $325, 2 prizes of $1000, and 1 prize of $2000. Assume that 32,000 lottery tickets are issued and sold for $1.
What is the best first glance prediction you can give the customer about the value of his house given your 2 variable linear regression analysis?
Home mortgage interest rates for 30-year fixed rate loans vary throughout the country. During the summer 2000, data available from various parts of the country suggested that the standard deviation of the interest rates
Using an alpha of .05, what can you conclude about homogeneity of variance from the output? Word process your responses on the SPSS output pages.
There are twelve months. Given the cohort of 100 which starts the program, about how many are left after twelve months?
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