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Question: A maker of portable exercise equipment, designed for health-conscious people who travel too frequently to use a regular athletic club, wants to estimate the proportion of traveling business people who may be interested in the product. A random sample of 120 traveling business people indicates that 28 may be interested in purchasing the portable fitness equipment. Give a 95% confidence interval for the proportion of all traveling business people who may be interested in the product.
Translate the following arguments into symbolic form. - If half the nation suffers from depression, then if either the insurance companies have their way or the psychiatrists have their way, then everyone will be taking antidepressant drugs.
A dataset has 1000 records and 50 variables with 5% of the values missing, spread randomly throughout the records and variables. About how many records would you expect would be removed?
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
the university of iowa is experimenting with a blend of soil amendments to be used in an analysis of variance study of
find the 98 confidence interval for the population mean micro if the sample mean is x 84.2 sample standard deviation
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
In a statistics lecture, students are asked whether or not they enjoyed doing statistics. Random sample of 50 students was taken and 30 of them said that they enjoyed doing statistics.
Find out the best predicted household size given that the household discards 5.00 lb of plastic.
Plot a histogram of each variable and discuss its properties. Plot a histogram of the residuals and discuss the results
Refer to a study published in the Journal of the American Medical Association and reported in the Sacramento Bee on January 26, 2000 ("Study Ties Hormone Replacement, Cancer" by Shari Roan, p. A1).- Do you think this research was an observational s..
If the store manager does advertise more, what is the probability that revenue will not increase? -What is the probability of not advertising more and revenue increasing?
assume that a procedure yields a binomial distribution with a trial repeated n times. use a binomial probabilities
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