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Because of high production-changeover time and costs, a director of manufacturing must convince management that a proposed manufacturing method reduces costs before the new method can be implemented. The current production method operates with a mean cost of $220 per hour. A research study will measure the cost of the new method over a sample production period. a. Develop the null and alternative hypotheses most appropriate for this study b. Comment on the conclusion when the null cannot be rejected c. Comment on the conclusion when the null can be rejected
Consider a machine that fills soda bottles. The process has a mean of 15.9 ounces and a standard deviation of 0.06 ounces. The specification limits are set between 15.8 and 16.2 ounces. a) Compute and interpret the machine's Cp
specimens of blood from 10 different animals were analyzed for blood count say y in units of 100 and packed cell volume
a building has ten floors plus a basement if 12 people get into an elevator at the basement and each chooses a floor at
In the context of hypothesis testing regarding one mean, the test (Z or t) may be statistically significant at the 5% level, but not significant in a practical sense at all. Illustrate the meaning of this statement by citing 3 examples from any ar..
Normal distribution with a mean value of 150 sec and a standard deviation of 20 sec. The fastest 10% are to be given advanced training. What task times qualify individuals for such training?
Suppose the assembly times follow normal distribution. Find out z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
Determine probability of waiting less than 12 minutes between successive speeders. By using cumulative distribution function of X.
You are using a significance level of α = 0.05 to test a claim that p > 0.5. Your sample is a simple random sample of size n = 49. Calculate β for the test, assuming that the true population proportion is 0.7 and showing all work.
Further support that 51.3% of births are male. What is the probability that a randomly chosen child will be affected by the disease.
Toby's trucking company determined that the distance traveled per truck per year is normally distrinuted, with a mean of 50.0 thousand miles and a standard deviation of 12.0 thousand miles.
A major issue facing many states is whether to legalize casino gambling. Suppose the govenor of one state believes that more than 55% of the state's registered voters would favor some form of legal casino gambling.
How do you verify that the assumption of a normal distribution is correct if you've only the mean and standard deviation?
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