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Golf course designers are concerned that the old courses are becoming obsolete because new equipment enables golfers to hit the ball so far. One designer believes the new course need to build with the expectation that players will be able to hit the ball more than 250 yards on average. A sample of 29 golfers was tested and their mean distance was 256 yards with standard deviation of 15. is this significant at the 5% level?
Find the probability of drawing either a king or a spade in a single draw from a pack of 52 playing cards.
You only worry if there is at least a 50 or more percent chance that you have the disease. Suppose that test has same specificity = p For what value of p will you start to worry?
Find the 95% confidence interval of the mean score for all golfers if this is a sample of 110 golfers instead of a sample of 93.
Over the last year the absentee rate at a large corporation averaged 8.2 days absent with a standard deviation of 6 days. One department with 40 employees had an absentee rate of 12 days per employee.
The availability of venture capital provided by big boost in funds available to companies recent years. According to Venture Economics, 2,000 venture capital disbursements were made in 1999.
The employees of a company were surveyed on questions regarding their educational background and marital status. Of the 600 employees
The annual precipitation amounts in certain mountain range are normally distributed with a mean of 88 inches, and a standard deviation of 10 inches.
Use RNG in Excel to generate n = 5 observations from the Normal distribution N(20, 5). Test H0: μ = 20 versus H0: μ ≠ 20 at the α = 0.05 level of significance. Repeat this process 100 times and then count the number of times that you reject H0.
Stats Questions Set. Which of the following statements correctly compares the t -statistic to the z -score when creating a confidence interval?
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?
The winning team's scores in 7 high school basketball games were recorded. If the sample mean is 10.3 points and the sample standard deviation is 0.10 points,
To give 98% confidence interval for population mean μ, you would use critical value.
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