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Random samples of populations (in thousands) of U.S. cities in three sections of the country are listed. Is there evidence to conclude a difference in means
A campus researcher wanted to investigate the factors that affect visitor travel time in a complex. multilevel building on campus.
To compare the effectiveness of three types of pain relievers, a homogeneous group of 22 students were divided randomly into three groups
There are four McDonalds restaurants in a particular area. The numbers of burgers sold at the respective restaurants for each of the last 4 days are shown below
Consider just your first count of the tossed coins. What is the observed probability of tossing a head? Of tossing a tail?
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.