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A biology quiz consists of ten multiple-choice questions. Seven must be answered correctly to receive a passing grade. If each question has five possible answers, of which only one is correct, what is the probability that a student who guesses at random on each question will pass the examination? (Round your answer to four decimal places.)
Please help showing the expression in a T1-83.
Find a 95% confidence interval for the mean of all drinks dispensed by this machine if a random sample of 36 drinks has an average content of 2.25 deciliters.
A manufacturer claims that the life span of its tires is 51,000 miles. Assuming the manufacturer's claim is correct, what is the probability the mean of the sample is 50767 miles or less?
the 70-year long-term record for weather shows that for new york state the annual precipitation has a mean of 39.96
Use Wilcoxon rank-sum test to test at the .10 level of significance to test the claim that the difference in dosage have significant effect on the length of time it takes guinea pigs to fall asleep.
a study of 35 browns gerbils showed that their average weight was 4.7 ounces. the standard deviation of the population
If p denotes the p -value of the corresponding hypothesis test, which of the following is true?
a bottling company is supposed to fill bottles with an average weight of 16 ounces. the company randomly selects
poisson distribution in studying a rare disease researchers notice that there is a 1 in 1000 chance of a person
The standard deviation in the 12-month earnings per share for 10 companies in the airline industry was 4.27 and the standard deviation in the 12-month earnings per share for 7 companies in the automotive industry was 2.27
She chose the sample of 25 women who were recently married for first time and found average age was 23.5 years. Standard deviation was 3 years. Must null hypothesis be rejected?
A random sample of size 16 is chosen from a population and a 90% confidence interval for the standard deviation will be determined. What value of should be located in the chi-square distribution table?
Find the optimal order quantity and what is the optimal total ordering cost per year vs. what is that cost with the current policy?
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