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Happiness A survey on StatCrunch asked people to report their level of happiness from 1 (least happy) to 100 (most happy). The table shows a sample of 20 female and 20 male responses.
(Source: StatCrunch Responses to Happiness survey. Owner: Webster West)
a. Make two separate stemplots (or dotplots or histograms). (Don't forget to show empty stems if you are making a stemplot.) Are the distributions skewed? If so, which way?
b. Compare the means.
c. Compare the standard deviations.
The Motion Picture Associa- tion of America studies the ethnicity of moviegoers to understand changes in the demographics of moviegoers over time. Here are the numbers of moviegoers (in millions) classified as to whether they were Hispanic, Africa..
An insurance company is trying to determine if there is a significant difference in the average number of sick days that registered nurses and nurse practitioners use per year. The data analysis provided the following output.
you want to know if redesign of the new whole foods has significantly increased sales. you sample 25 customers who shop
Judging from recent experience, 5% of the computer keyboards produced by an automatic, high-speed machine are defective. If six keyboards are randomly selected, what is the probability that none of the keyboards are defective?
to test at the 5 level of significance whether the true proportion of diabetics in the state of florida between the
A certain airplane has two independent alternators to provide electrical power.
At a parking lot there are twelve places arranged in a row. A man observed that there were eight cars parked, and that the four empty places were adjacent.
1 suppose we want to determine the binomial probabilityp of getting 4 heads in 15 flips of a 2-sided coin.nbsp using
Medicine and Clinical Studies Many researchers believe moderate physical activity, such as walking, will help prevent weight gain.
Conduct a descriptive analysis on any 2 interval / ratio variables - The abstract briefly summarizes your paper in 120 words or less.
Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work so I can see how to do this for the future. This one is good example of what I can do in future for real estate.
What must the selling price be for the company to consider selling the rights to the product - develop a risk profile for the optimal strategy.
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