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Use an appropriate sample space with equiprobable elements to answer the following question. You enter a grand-prize lottery along with nine other people. Ten numbered lots, including the winning lot, go into a box. One at a time, participants draw a lot out of the box. Does it make a difference to your chance of winning whether you are the first or the last to draw a lot?
a. What sample size would you recommend if an insurance agency wanted the sample mean to estimate the population mean within $25? b. What is the probability that the sample mean is within $100 of the population mean?
Elections suppose a county has 800,000 registered voters, 480,000 of whom are Democrats and 290,000 of whom are Republicans. If a registered voter is chosen.
A Department of Trasporta repot about air travel found that nationwide, 76% of all flights are on time. What is the probablity that you will have have excatly 80 flights on time?
Women executives. A company is criticized because only 13 of 43 people in executive-level positions are women.
Mr. Marcy's nephew is going to trial for embezzlement, and nine jurors are to be randomly selected from the adult citizenry. What is the probability that at least four of the jurors will be charge-account holders?
A recent national survey found that high school students watched an average (mean) of 6.8 videos per month. A random sample of 36 college students revealed that the mean number of videos watched last month was 6.2
Based on this info, how do I compute the posterior probabilities under each prediction, and determine if the study should be undertaken?
If a random sample is to be drawn from a population consisting of 5000 sampling units with a variance of 20% and a desired standard error of 1.6%. What is the optimal sample size?
Compute the mean and median and compute the variance, standard deviation, range, and coefficient of variation.
A domestic appliance manufacturer is evaluating its delivery system from the production plant to showrooms around the country.
The researcher found that Lincoln's educational score did not correlate with the expected variables.
Find that the mean consumption of tea is 7.8 gallons per year with a standard deviation of 2.67 gallons.At α=0.07 can you support the society's claim?
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