Six hundred adult Americans were asked by telephone poll, "What do a middle-class income?" The results are in Table 2.71. Also, include left endpoint, but not the right endpoint. you think constitutes Relative Salary ($) < 20,000 20,000-25,000 frequency 0.02 0.09 25,000-30,000 0.19 30,000-40,000 0.26 40,000-50,000 0.18 50,000-75,000 0.17 75,000-99,999 0.02 100,000+ 0.01 a. What percentage of the survey answered "not sure"? b. What percentage think that middle-class is from $25,000 to $50,000? C. If you constructed a histogram of the data. (Note: you do not actually have to make a histogram) i. Should all bars have the same width, based on the data? Why or why not? il. How should the <20,000 and the 100,000+ intervals be handled? Why? d. Find the 40th percentile e. Find the 80th percentile

Based on the following data set: 150, 180,210,220,250,325 What would be the change to the mean, median, and mode if 325 is changed to 150.                   Mean       Median    Mode Original  Changed

What is the median?

Find the mean, median, and mode Scores F 95-99 10 90-94 20 85-89 25 80-84 28 75-79 12 70-74 8