Would you expect distributions of these variables to be uniform, unimodal, or bimodal? Symmetric or skewed? Explain why.

Mariah Jacobsen is the marketing manager at ABC Electronics, a major consumer electronics supplier in the northwest. Over the last five years, sales of the company's flagship product - the Wizer Anonymizer (the WA) - have been 45000, 45500, 44500, 46000 and 44000 units. This rate of sales is considered average for the product over the last twenty years or so. Ms. Jacobsen believes that the distribution of the WA's sales is normal with a standard deviation of 1500 units. If she were asked to make a forecast of next year's sales to upper management, what is the likelihood that she would be correct if she predicts sales between 43000 and 46000?

The table below shows the share of income going to each quintile of the income distribution for Neverland in 1980 and 1990. Complete the table below finding the the cumulative share of income for 1980 and 1990 and answer the following: Share of income in Cumulative share of Share of income in Cumulative share of Quintiles 1980 income in 1980 1990 income in 1990 1st 7% 6.6.% 2nd 11.5% 11.5% 3rd 17% 16.3% 4th 24.8% 22.7% 5th 39.7% 42.9% a) Sketch the Perfect Equality line and the Lorenz curve for 1980 and for 1990. Don't forget to label your graph and your curves! b) According to the Lorenz curves that you draw in (a), which year had worse income inequality, 1980 or 1990? JUSTIFY your answer! NOTE: This is a file upload question. Work your answer in a piece of paper, take a picture and upload your file.

8. On the first Saturday in May, the Kentucky Derby takes place at Churchill Downs in Louisville, Kentucky. A total of 20 horses race in the Kentucky Derby, and they race around a track that is 1.25 miles long. The graph below shows the speeds (in miles per hour, or mph) for all 123 horses who have won the Kentucky Derby from 1896 through 2018. a. Describe the shape, center and variability of the distribution of speeds. Frequency 30 25 20 15 10- 5- 0 b. The 2018 winner of the Kentucky Derby was Justify. Justify had a speed of 36.23 mph. Is 36.23 mph a low, high, or typical amount of this distribution? Please explain. c. Approximately what percentage of winners in this distribution have speeds that are greater than or equal to 37 mph? 33.75 34.50 35.25 36.00 36.75 37.50

2.7 - a. Write a few short sentences that compare the center and the spread for each dot plot. b. Based on this sample, cereals from which manufacturer tend to have no variation in calories?