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The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.22 g/mi and standard deviation 0.057 g/mi. A company has 25 cars of this model in its fleet.
What is the level L (±0.0001) such that the probability that the average NOX level for the fleet is greater than L is only 0.03?
Can the value 0.64 be rejected if a survey of 495 homes in Omaha yields 332 with one or more lawn mowers? Use = 0.05.
Then, give two examples of correlation which are evaluated in a business environment and discuss the decision made by evaluating the correlation.
In a random sample of 80 items, the defect rate is 5% but the manager claims that this is only a sample fluctuation and production is not really out of control. At the 0.01 level of significance, does the data provide sufficient evidence that the ..
Give an estimate of the change in expected peak voltage with a 1% increase in light absorption. Estimate the expected value of peak voltage when % light absorption is 20.
If np ≥ 5 and nq ≥ 5, estimate P (more than 5) with n=14 and p=0.3 by using the normal distribution as an approximation to the binomial distribution; if np
Computing the probability values using normal distribution - what proportion of licensed drivers are less than 30 years old?
Lashing together logs of diameter .30m and length 1.8m. How many logs will be needed to keep them afloat in fresh water. take the density of the logs to be 800kg/m^3.
Assume that standard deviation is $3,204 and that 36 four-year institutions are arbitarily selected. Determine the probability that sample mean cost for these 36 schools is less than $25,000.
There are four auto body shops in a community and all claim to promptly serve customers. To check if there is any difference in service customers are randomly selected from each repair shop and their waiting times in days are recorded.
Based on these findings, can we reject the company's claim that the drug is equally effective for men and women? Use a 0.05 level of significance.
What value is business research and hypothesis testing to a company? What is the "perfect" standard normal distribution? Explain your answer.
You are asked to estimate the chance that the sum will be positive.
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