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A company manufactures automobile transmissions. It has been determined that the lifetime (time until failure) of this transmission is normally distributed with an average of 78,000 miles and a standard deviation of 15,000 miles. What percentage of these transmissions will last at least 90,000 miles?
A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief is greater than or equal to the annual spending (per person) for non-prescription aller..
List all samples of size 2, and compute the mean of each sample. Compute the mean of the distribution of sample means and the population mean. Compare the two values. Compare the dispersion in the population with that of the sample means.
What are the similarities and dissimilarities between a chi-square analysis and a correlation analysis? Suppose you conducted a study to see if there was an association between political party affiliation and whether or not someone voted.
Construct a 95% confidence interval for the proportion of adults from the West who say traffic congestion is a serious problem.
What is the probability there will be between 10 and 14 calls inclusive arriving at the company in the next 15 minutes?
Describe the independent variable and the dependent variables?
Florida State University administers a mathematics placement test to students where they 1st enter the university.
All else being equal, what occurs to your confidence interval when you increase value of alpha?
What is the probability that an assembly chosen at random will have a combined dimension in excess of 262?
Assume that in a hypothesis test with null hypothesis Ho: μ = 14.0 at a= 0.05, that a value of 13.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of:
Summarize the relationship between sample size and confidence level.
Compute mean and standard deviation for sample of N = 8 females and sample of N = 8 for males.
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