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Over many years of administering tests to my statistics students I have found that the overall average of the scores on the first exam that I give each semester is 76.
Well, this semester my class (36 of them -- assume this is a sample) scored an average score of 80 on the exam (standard deviation was 6). At the .05 level of significance, is this class smarter than the classes I usually have?
You have been research for your statistics class on how nervous the American adults are in general, you have decided to use HINTS 2007 data set that has a scale (going from 0 to 24)measuring the psychological distress of the respondents.
Analyze the process of statistical quality control and determine which part of the process would be most difficult and what steps could be taken to mitigate the anticipated difficulty.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.50 inches.
Now make a scatter plot of data from 1982 to 1998 (again, use years since 1800). Determine a linear, power, or exponential model that explains the crude oil production during this time period.
Also, what information do you need to get from the problem to put into Minitab to run a binomial calculation?
A new-car dealer is leasing various brand-new models for the monthly rates(in dollars) listed below. Estimate the true population variance and standard deviation in leasing rate with 90% confidence.
Let X be the number of correct guesses by your friend in the 100 trials and Use the Normal approximation with the continuity correction - Which of the following might be reasonably modeled by the binomial distribution
Using the information provided, determine the optimal number of clerks to have on duty each Satyrday to minimize the store's total expected cost.
For adults 60 years or older, they found a mean daily intake of 721 mg with a standard deviation of 454 mg. Using these values for the mean μ and standard deviation σ for the U.S. population:
A five-star hotel accepts 100 room reservations daily. For each reservation accepted, there is a 7% chance that the guest will not arrive.
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in the California and finds tha..
The National Highway Association is studying the relationship between the number of bidders on a highway project and the winning (lowest) bid for the project.
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