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A golf course in California has determined that the mean time it takes for a foursome to complete an 18 hole round of golf is 4 hours 35 minutes (275 minutes) with a standard deviation of 14 minutes. The time distribution is also thought to be approximately normal. Every month, the head pro at the course randomly selects a sample of 8 foursomes and monitors the time it takes them to play. Suppose the mean time that was observed for the sample last month was 4 hours 44 minutes (284 minutes). What is the probability of seeing a sample mean this high or higher?
Either direction from what would have been obtained by interviewing all voters in the United States. Find the sample size suggested by this statement.
A student is selected at random from the class. What is the probability that the student is both a junior and an economics major?
The NAEP test was also given to a sample of 1077 women of ages 21 to 25 years. Their mean quantitative score was 275. Take it as known that the standard deviation of all individual scores is = 60.
What measure would you use and why? Make sure to provide enough detail about the situations so that others can understand your responses. Work as a correctional officer.
The graduates find a job within 1 year of graduating. What is the probability that among 9 randomly selected graduates, at least 1 finds a job within 1 year.
Using the Empirical Rule for this data, what amount should be considered the cut-off for sales amounts being classi ed as unusually low?
If appropriate, use the Tukey-Kramer procedure to examine differences among machines. What can you conclude about the effects of machines on breaking strength? Explain.
What is it that differentiates a binomial probability distribution from any other probability distribution? & The employees at a General Motors assembly plant are polled as they leave work.
Using the p- value approach, test the hypotheses at the 5% level of significance.
Find the probability that 70 randomly selected washing machines will have a mean replacement time less than 9.1 years.
6 % have both defects. If you purchase one of the flashights in this shipment, find the probability that it has the following: defective bulb or a defective battery.
You are running a chi-squared test. You have 2 groups with 3 characteristics each, what would your critical value be with an alpha of .025?
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