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An auto manufacturer advertises that 90% of the cars weve ever made are still on the road.
a) Assuming this is literally true, how can it be explained?
b) What facts / statistics would you need to know to expose this misleading claim?
Bingo Hamburger Co has a chain of 12 stores in a large city. Sales figures and profits for the stores are given in the following table. Obtain a regression line for the data & predict profit for a store assuming sales of $10 million.
What is the critical F value for a sample of four observations in the numerator and seven in the denominator?
Distribution with the mean of 10,000 hours. Component has already been in operation for its mean life. Determine the probability that it will fail by 15,000 hours?
A company has developed the new battery, but the average lifetime is unknown. In order to estimate the average, a sample of 150 batteries is tested and an average lifetime of this sample is found to be 250 hours.
Find the maximum and minimum prices of the houses a contractor will build to include the middle 65% of the market.
A state executive claims that the average number of acres in western Pennsylvania State Park is less than 2000 acres. A random sample of five parks is selected, and the number of acres is shown. At alpha=.01, is there enough evidence to support th..
For the sample of 32 lg us cities the correlation between the mean # of sq ft per office worker and the mean monthly rental rate in the central business district is the -.363 at the .05 significance level
Elucidate this data use an appropriate statistical test to explain whether the population mean TV "on" time has declined in the past decade.
Explain what a Chi-Squared Test is used for and give an example how you could possibly use this test. What is an ANOVA test? Create an example where this test could be used.
The mean age of adult learners in a chosen class of 31 students is 33.8 years. The standard deviation is equal to 7 years.
Please describe and define what the chi-square analysis is, the conditions under which it is used, and how it compares to the Pearson Correlation.
Suppose 31% offer both retirement plans and life insurance as benefits. If a small company is randomly selected, determine the following probabilties:
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