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A company is evaluating the impact of a wellness program offered on-site as a means of reducing employee sick days.
Perform the five-step hypothesis test on the data. Explain which nonparametric test you used to analyze your data and why you chose that test.
What are life expectancy tables and why are they important for life insurance companies?
Let sample mean = 70 and the sample variance = 36 and assume the data is normally distributed.
What is the purpose of a Wilcoxon signed-rank test? Explain.
In 1995, the median age of the residents of one city was 36 years. A random sample taken this year of 10 residents of the town yielded the following ages
What is the probability that more than 1 couple say they plan to travel to Europe?
Determine the absolute differences for the values computed in column 4. Recall that in an absolute difference we ignore the sign of the difference.
A person lives in the small town described above and in a household with two computers. He claims that having two computers is unusual.
Complete the following exercises using Non-parametric Methods:
What are the characteristics of Standard Normal Distribution. Explain with examples. Your response should be around 250 words in length.
The 1997 price/earnings ratios for a sample of 12 stocks are shown in the following list (Barron's, December 8, 1997).
Identify a real-life example or application of either the binomial or poisson distribution.
Assuming that there is no cost to enter the .sweepstakes, find the expected value of the amount won for one entry. Round to the nearest tenth.
Perform the sign test to analyze the difference in the matched pairs. It is not important what the numbers mean.
Suppose someone gives you 9 to 2 odds that you cannot roll two even numbers with the roll of two fair dice.
It has been suggested that daily production of a subassembly would be increased if better portable lighting were installed and background music and free coffee
Use the following data set. The data set represents incomes (in thousands of dollars) of 20 employees at an engineering firm.
The president of a large oil company must decide how to invest the company's $10 million of excess profit.
Develop a tree diagram for tossing two, eight-sided gaming dice to figure out how many possibilities there are.
In how many ways can the countries be assigned so that all of the North American countries are assigned?
How many people made a purchase at Sears but did not make a purchase at JC Penney?
Based upon statistical studies it has been found that 3.32% of all births in the United States will result in twins being born.
The National Association of Home Builders provided data on the cost of the most popular home remodeling projects. Use the Mann-Whitney-Wilcoxon test
The polisher will be accepted only if the percentage of polished lenses containing surface defects does not exceed 1.5%.