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The Occupational Safety and Health Administration (OSHA) mandates certain regulations that have to be adopted by corporations. Prior to the implementation of the OSHA program, a company found that for a sample of 40 randomly selected months, the mean employee time lost due to job-related accident was 45 h. After implementation of the OSHA program, for a random sample of 45 months, the mean employee time lost due to job-related accidents was 39 h. It can be assumed that the variability of time lost due to accidents is about the same before and after implementation of the OSHA program (with a standard deviation being 3.5 h):
a. Find a 90% confidence interval for the difference in the mean time lost due to accidents.
b. Test the hypothesis that implementation of OSHA program has reduced the mean employee lost time. Use a level of significance of 0.10.
where E is the energy of the photon in J, h is Planck's constant (6.626 x 10-34 J*s), and c is the speed of light (3.00 x 108 m/s). If we determine the wavelength (lambda) of light emitted from a sample of antimony to be 206.8 nm, what is the energ..
Construct descriptive statistics for blood glucose level before the drug was administered and comment.- What is the correlation between blood glucose levels before and after administration of the drug?
A further analysis of differences between every pair of groups was reported as all p 0.01.9 Interpret these reported ?ndings. What were the degrees of freedom for Factor, Error, and Total?
A manager wishes to determine the relationship between the number of miles (in hundreds of miles) the manager's sales representatives travel per month and the amount of sales (in thousands of dollars) per month. Find the equation of the regression..
Assume each lifetime is independent. Round your answer to four decimal places (e.g. 98.7654). What is the probability that the lathe will operate at least seven years?
The article can be on Descriptive Statistics, Probability and the Normal Distribution, Sampling and Sampling Distributions, Regression Analysis, or Time Series Forecasting.
Use alpha level. 05 to compute and interpret Pearson's r and to test whether it is important (using all your steps for hypothesis test).
Standardize the value according to the given average and SD - unstandardize the value according to the given average and SD
In order to compare the means of two populations, independent random samples of 484 observations are selected from each population, with the following results:
A thorough examination reveals there is nothing wrong with the filling machine. From a statistical standpoint, was there a "type" error made? If yes, which type? Explain.
Search the internet for real-life examples of probability. As a hint, type "probability" followed by a topic of interest to you into the search engine
binomial distribution. the centers for disease control say that 30 of high school students smoke cigarettes. suppose
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