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Q1) According to National Institute for Occupational Safety and Health, job stress poses main threat to health of workers. A national survey of restaurant employees determined that 75% said that job stress had negative impact on their personal lives. A sample of 100 employees of restaurant chain determines that 68 answer "Yes" when asked: "Does job stress have negative impact on your personal life?" Is this good reason to think that the proportion of all employees of this chain who would say "Yes" varies from national proportion, p0 = 0.75? Use a 5% level of significance.
Q2) In fiscal 1996, U.S. Agency for International Development provided 238,300 metric tons of corn soy blend (CSB) for development programs and emergency relief in countries throughout world. CSB is a highly nutritious, low-cost fortified food which is partially cooked and can be included into different food preparations by recipients. Specifications for CSB state that mixture must contain 2 pounds of vitamin premix for every 200 pounds of product. These specifications are designed to make a mean vitamin C content in final product of 40mg per 100g. Sample of 8 readings from production run has mean of 22.50mg per 100g with standard deviation of 7.19mg per gram. Is there significant evidence that this production run doesn't meet specifications? Use a 1% level of significance.
Find the probability that in a given year,a) Exactly one major hurricane will strike the U.S. mainland
The Type 1 error states the probability of being wrong whenever:
The main goal of correlation research is ______________
If a card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is one of the following?
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
Determine the distribution of X? Determine its parameters?
Determine the calculated value of the test statistic? What distribution does test statistic have when null hypothesis is true?
Determine the dependent variable(s)? Determine the value of the statistic? Write down the name of one variable not mentioned in this study that one might wish to control for.
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
The average age of the students in the sample was 23 with a standard deviation of 3.5: a) Formulate the hypotheses for this problem.
X is a continuous random variable uniformly distributed on [20, 45] that is, the end points c = 20 and d = 45.
Solve linear program graphically
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