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The CEO of an oil company has asked for your help in analyzing a confidential data associated with drilling holes. It is known that the diameter of the hole is normally distributed with population mean µ = 2 inches and standard deviation σ = 0.06 inch. A random sample of nine measurements had a sample mean of1.95 inches.
(a) Write the null hypothesis and alternative hypothesis.
(b) Using a significance level of α = 0.05, determine if the drilling machine should be adjusted.
(c) What is the p-value of the test?
Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and sigma is unknown.
the motion picture industry is a competitive business. more than 50 studios produce a total of 300 to 400 new motion
You are running a chi-squared test. If you have 5 groups with 3 characteristics each, what would your critical value be with an alpha of .25? a . Between 0 and 3.0
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
Find the z-score for each score in the population. Transfer the original population into a new population of N=5 scores with a mean of μ=60 and a standard deviation of σ=8
When the data have the properties of ordinal data and the interval between observations is expressed in terms of a fixed unit of measure, the variable has which scale of measurement
The total losses, say X, divided by the total premiums, say T. The bonus equals (0.5 - L)(T/30) if L
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Which of the following studies used a participant observer approach?
regression nuts and boltsconsider the following income and consumption data each measured in 1000s from 10 randomly
Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
The Spanish patients, two men and two women, were elderly and very ill. All four had undergone routine dialysis at the Hospital de la Princesa. Soon after, they began sweating and vomiting, some of them in excruciating pain. They died within a few..
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