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1. Why is a random variable said to be "random"?2. Indicate whether each of the following random variables is discrete or continuous.
a. The diameter of aluminum rods coming off a production line
b. The number of years of schooling employees have completed
c. The Dow Jones Industrial Average
d. The volume of milk purchased during a supermarket visit.
Half of the 1000 emloyees were involved in some type of exercise. What is the probability that an employee will have a cold next year?
Name the inferential statistical test that would be used for the method of training and why?
Using the mean for this sample, and assuming that the population standard deviation has remained unchanged at 2.5 minutes, construct the 95% confidence interval for the population mean. Is 35.0 minutes within the confidence interval? Interpret you..
tim gets 15 emails on average per day i.e. per 24 hours. emails arrive randomly and independently.a what is probability
Operations manager thinks that only 10% of room service orders must take longer than 25 minutes if hotel has good customer service. Does hotel room service fulfil this goal?
Test to determine if there is a significant negative relationship between the independent and dependent variable at a = .05 and .01
Identify the independent and dependent variables. Perform a regression analysis on the data.
a recent study of 50 self service gasoline stations in the greater cincinnati northern kentucky metropolitan area
a major issue facing many states is whether to legalize casino gambling. suppose the governor of one state believes
x and s are equal to 3.7 and 0.5, respectively, find a 99% confidence interval for the mean pH in rainfall and interpret the interval.
Suppose we are conducting a test with alpha =0.10 and we observe a p-value equal to 0.09. What is your test decision?
q1. suppose that x xijnx2 is an observed data matrix from a bivariate normal distribution nmusigma2i where i is the 2
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