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A survey found that 85% of women in a given city enjoy shopping online. Suppose you randomly selected 6 women from the city and ask them whether or not they enjoy shopping online. Find the probability that exactly 4 say they enjoy shopping online.
0.176
0.824
0.352
0.128
let the number of trials be n = 3, and let the probability of success be p = 0.0228. Use a calculator to compare:
Test whether race and NATFAE are independent (α = 0.05). What do you conclude?
The following study was developed by Economist Simon Fass. Fass surveyed a sample population of low-income households in St. Martin. The variables analyzed were monthly income per adult and choice of rental contract for housing.
The mean amount of time a (unnamed) computer server is down is 18.3 minutes with a standard deviation of 5.7 minutes.
For the last 18 review periods the average sales figure has dropped to $11,500 with a standard deviation of $4,000. Management is concerned. Perform a hypothesis test to determine if this change in sales is a potential problem.
Multiple choice questions based on multiple regression - Find the coefficient of determination for the above model
Determine the probability that none of the calculators will be defective?
Confidence interval for the population mean - Prepare a 99% confidence interval for the population mean.
Reynolds Electronics accepts a lot from a particular supplier if the defective components in the lot do not exceed 1%. Suppose a random sample of five items from a recent shipment is tested.
What is the probability that the mean starting salary is between $31,000 and $33,000 - Graduates from a graphic arts course at a community college have a mean starting salary
Report the t-value, whether you accept or reject Ho, and whether the difference was significant in a brief sentence.
What is the maximum error of estimate for p ?
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