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A sample of 25 different payroll departments found that the employees worked an average of 310.3 days a year with a standard deviation of 23.8 days. What is the 90% confidence interval for the average days worked by employees in all payroll departments?
What is the standard deviation of expected returns for Stock X? For Stock Y?
Can you provide another explanation for this one: Zc/Tc for 86% confidence interval when the sample size 50?
Explain the chi-square test of homogeneity and show the formula for the test statistics for the test of homogeneity. Describe a sign and test and show the six steps of the test-of-hypothesis procedure.
Consider an experiment that results in a positive outcome with probability 0.38 and a negative outcome with probability 0.62. Create a new experiment consisting of repeating the original experiment 3 times. Assume each repetition is independent of..
What fraction of cups will probably overflow if 230-milliliter cups are used for the next 1000 drinks? 0.0228 or 23 out of the 1000 drinks will overflow.
Given the following values 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and x and y form a linear equation in one variable, a equation in two variables, a quadratic equation a polynomial of three terms
The entire shipment is accepted if only one or non of the tablets is defective. If the defect rate is 5% then what is the probability that the shipment will be accepted?
A local consultant randomly selects a sample of 36 meals whose mean price is determined to be $8.75. Assuming that σ = $0.75, calculate a 95% confidence interval for the population mean price.
The mean area of several thousand apartments in a new development is advertised to be 1250 sq. ft. An engineer measured a random sample of apartments: 1244 1245 1242 1245 1237 1245 1246 1232
Find the probability that a random sample of 4 male Siberian tigers will have a sample mean weight more than 450 lb.
Using the above database, compute a t-test comparing males' and females' heights. You must determine which type of t-test to compute. Write a short interpretation of the results.
Determine expectation of number of vehicles passing through this specified point in ten minutes.
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