Assume a simple random sample
According to USA Today "Snapshot", 26% of U.S. adults do not have any credit cards. Assume a simple random sample of U.S. adults is obtained.
1) In the random sample of 500 adults, determine the probabibilty that less than 20% have no credit cards?
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A survey of 1257 student loan borrowers found that 438 had loans totaling more than $20,000 for their undergraduate education. Give a 98% confidence interval for the proportion of all student loan borrowers who have loans of $20,000 or more for th
The rancher has 288 feet of fencing to enclose two adjacent retangular corrals. What dimensions will make largest total area? Determine maximum total area?
Based upon these survey data, is it reasonable to conclude that more than three-quarters of adult Americans plan to change their shopping habits if gas prices remain high? (Use ? = 0.01. For z round the final answer to two decimal places. For P gi
Computers in some vehicles calculate various quantities related to performance. One of these is the fuel efficiency, or gas mileage, usually expressed as miles per gallon (mpg).
Write equation of tangent line at point of tangency indicated. Write any point(s) where there is change in concavity of function.
In specific lottery game, you pay $1 to select a sequence of three digits, such as 233. If you select the same sequence of three digits that are drawn, you win and collect $500. What is your expected value? Should you play?
Assume the weights of the cans of mixed nuts have normal distribution with mean 32.4 ounces and standard deviation 0.4 ounces. For a random sample of size n = 9,
Some customers believe that the variance of the weight of boxes with Captain Crisp cereal is more than 0.05. Use alpha = 0.10 to test the customers' claim.
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