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An article in the San Jose Mercury News stated that students in the California state university system take 4.5 years, on average, to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 49 students and obtain a sample mean of 5.1 with a sample standard deviation of 1.2. Do the data support your claim at the 1% level?
Car X used k gallons of gas while traveling p miles, and car Y used s gallons of gas while traveling r miles. What was the ratio of the number of miles per gallon for car X to the number of miles per gallon for the car Y?
The first digits of randomly selected expense amounts actually follow Benford's law. According to Benford's law, what's the expected value of the first digit?
the downtown parking authority of tampa florida reported the following information for a sample of 241 customers on the
compare and contrast leadership development interventions with career development interventions. in what areas and
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?
It was suggested that five is the minimum number of data points for the least likely cate gory in constructing histograms. In many cases, however, we must estimate probabilities that are extremely small or for which relatively few data are availab..
The group consists of 180 married couples. A random split into teams of 3 is chosen, with all possible splits equally likely.
High correlation does not mean that the values are the same. Investment reports often include correlations.
What is the etymology of the word "history" ? What is your current understanding of the word? Is history merely recording the "facts" of what happened?
Compare the two services overall percentage of late deliveries.- Do you agree that Pack Rats delivers on time more often? Why or why not? Be specific.
A qualitative assessment of both texture and color is made with the following results.
you take 100 random samples of size four each and, for each sample, find a 95% confidence interval for the mean IQ.
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