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1. What is the difference between a point estimate and an interval estimate? How would you calculate a confidence interval with a z test?
2. What is an effect size, and why would reporting it be useful?
Create a bell curve chart that shows the number of men needed per day for a 10,000 man hour job. The start date is 1/1/2008 and the end date is 6/1/2008.
Using the following data on 15 workers, construct an exact 95% confidence interval for µ.
One of the non-destructive tests (NDTs) for assessment of the integrity of concrete structures is ultrasonic pulse velocity testing. The test can signal that a concrete section is either intact or that a problem exists.
A two tailed test is conducted at 5% significance level what is the P-value required to reject the null hypothesis.
Find the critical value for different types of sample size and level of significance:
If employee is chosen at random, determine the probability that employee is female and salaried staff? Choose the best answer from the following.
Assuming that the process is operating correctly according to specifications, what is the probability that a sample will indicate that an adjustment is needed?
Explain the logic of the ordinary least Square (OLS) method? How are the least squares formulas for the slope and intercept derived?
What is the probability that they all hit the target?
Describe the mean difference that is the main effect for the treatment. Describe the mean difference that is the main effect for gender. Is there an interaction between gender and treatment? Explain the answer
Using the following number of flirtations actions in the 4 hour period, test the "null hypothesis'
The Weschsler IQ test has a μ =100 and a σ = 15. A vitamin company said if people took vitamin X for 30 days their IQ would improve. A simple random sample of 49 people took the vitamins for 30 days. They then took the IQ test. The mean IQ of the ..
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