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Ho: mean = 5
H1: mean <5
A test is performed with a sample size 9. The sample mean was 4.00 with a sample standard deviation of 1.2. Assume that the population is approximately normal. Use the TI 84 plus calculator to compute the p-value. Round four decimal places.
The table summarizes the opinions of various groups on the issue of offshore drilling. Use this table to calculate probabilities in Problem.
For gamers who play on consoles, they would report that teens are 1.65 (89/54) times more likely to play on consoles. Use the bootstrap to give a 95% confidence interval for this ratio.
question a market testing company wants to know if there is a difference in preference between two new types of
many manufacturing problems involve the matching of machine parts such as shafts that fit into a valve hole. a
Suppose 72% of the drivers regularly use seat belts. You take a random sample of 10 of these drivers. What is the probability that the number regularly using seat belts is at least 7?
What is a nonparametric procedure? Describe specifically when you would utilize a nonparametric test. Under what conditions should you use the Wilcoxon sum rank test?
A representative of the Environmental Protection Agency (EPA) wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples. How many different samples are possible?
In a survey of women in a certain country (ages 20-29) the mean height was 64.5 inches with a standard deviation of 2.75 inches. What height represents the 90th percentile? What height represents the first quartile?
If the timber house is leased within one week, what is the probability that the brick house is also leased within one week?
no children which is equal to value obtained by census. Give z statistic (rounded to two decimal places) and P-value. What do you conclude? (Use = 0.10.).
Many companies offer customers various discounts from their normal or list price to entice them to buy. Discuss the main types of discounts offered.
If two diodes are selected at random without replacement, what is the probability that at least one of these diodes is defective?
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