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Suppose the sample size from the normal population is 11. Also assume that the population standard deviation is unknown. What is the value of t for a .05 area in the right tail of this distribution?
a) 1.860
b) 1.812
c) 1.796
d) 1.771
The major shopping areas in community of Springdale include Springdale Mall, West Mall, and downtown area on Main Street. A telephone survey has been conducted to determine strengths and weaknesses of these areas and to find out how they fit in th..
Determine the sample size needed in order to be 99% confident that the sample proportion of the current customer accounts is within .03 of the true proportion of all current accounts for this company.
Cough-a-Lot children's cough syrup is supposed to contain 6 ounces of medicine per bottle. However since the filling machine is not always precise, there can be variation from bottle to bottle. The amounts in the bottles are normally distribut..
A manager of a small store wanted to discourage shoplifters by putting signs around the store saying "Shoplifting is a crime!" However, he wanted to make sure this would not result in customers buying less.
1.reading highway signs is not always easy especially if your vision is imperfect. vision in general tends to
Assume the likelihood that any flight on Northwest Airlines arrives within 15 minutes of the scheduled time is 0.90. We choose four flights from yesterday for study.
Nationwide, the average time until a electric utility customer service representative answers a call is 260 second. The Gigantic Kilowatt Energy Company rnadomly sampled 30 calls and found that, on average, they were answered in 227 second with a ..
Suppose probability that person has desease is 0.06 for all people, independently of each other, and calculate expected number of tests essential for each group.
A particular company offers a 500$ deductible policy. If the company wishes its expected profit to be $100, what premium amount should it charge?
The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators observed a random sample of 117 female hispanic drivers in Boston
Analyze and support whether you believe that the changes recommended are statistically valid and sound enough to make practice changes in a hospital for the two papers listed below. Also in your answer please touch on the following items
1. distinguish between classification and tabulation of data. what are the types of classification of data?2. calculate
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