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Two surveys are taken on different days regarding the number of shots it takes to complete a golf course. Suppose the first survey had 16 subjects and a sample standard devation of 5 shots. Suppose the second survey had 20 subjects and a sample standard devation of 9 shots. Prob. Type I error = .05 Can we supprt the claim that the variation on the second day was greater than the variation on the first day?
1. a medical researcher contends that lung capacity varies significantly between smokers and nonsmokers. the mean
a company wishes to set control limits for monitoring the direct labour time to produce an important product. over
The nighttime cold medicine Dozenol bears the label indicating the presence of 600 mg of acetaminophen in each fluid ounce of drug.
What results in your departments seem to be correlated or related (either causal or not) to other activities? How could you verify this? What are the managerial implications of a correlation between these variables?
Using the sample obtained, draw a histogram and calculate mean and variance for 1000 sampled values for random variable Y = X2.
Give an example of a function using a set of at least 4 ordered pairs. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and 5.
The standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was
Only 40% of these eruptions last longer than 2 minutes. For each of the following random variables, write down the distribution and the PMF. (Identify all parameters) What are the expectation and variance?
Why is cohort studies more expensive than case-control studies? I know one problem is cohort studies often must be followed up for a long period to determine whether the outcome of interest has developed and they are more expense than case-control..
calculate the appropriate disease frequency rate. show your work. the cumulative incidence rate in a population of
Write a brief summary report on the demographic and class distribution of this sample. Paste the tables and charts into your report and label each of them properly.
A motor transport company has 50 similar buses. The management suspects that its control of these vehicles is inadequate. What suggestions could you make for investigating vehicle use, and tightening managerial control over the company?
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