MATH 2003-Z01 Fall 2020 Assignment 2 Name: Due on XXXXXXXXXX Show all work clearly and in order to receive full credit. Circle or otherwise indicate your final answers. Justify your answers...

MATH 2003-Z01 Fall 2020 Assignment 2 Name: Due on 09.6.20 Show all work clearly and in order to receive full credit. Circle or otherwise indicate your final answers. Justify your answers algebraically whenever possible. Submit your completed assign- ment as either a .doc, .docx, or .pdf format file. No late work will be accepted. You may have to copy your graphs from excel and paste into a word processor. 1. The following relative frequency distribution presents the usage in percent of various Internet browsers worldwide in a recent year. Browser Usage Internet Explorer 55.99 Firefox 20.63 Chrome 15.74 Safari 5.46 Opera 1.77 Others 0.41 Source: www.netmarketshare.com (a) Construct a pie chart for the above data (use excel or another statistical software) (b) Is it true that Chrome and Safari browsers account for more than 30% of usage? 2. The following table presents the percentage of children who lived in poverty in several Colorado counties in 2008 and in 2013. County Percent in 2008 Percent in 2012 Adams 18.7 22.7 Arapahoe 13.7 16.4 Boulder 9.3 13.0 Denver 27.3 26.2 El Paso 15.7 18.0 Jefferson 11.2 12.2 Source: Colorado Children’s Campaign (a) Construct a side-by-side bar graph for these data (b) Is it true that the poverty rate was higher in 2013 than in 2008 for each of the counties? (c) Which county had the greatest increase? 3. The following table presents the number hours a sample of 40 subscribers listened to Pandora Radio in a given week. 52 18 2 20 9 9 11 6 18 6 4 12 9 16 10 37 15 18 8 23 4 3 17 19 12 20 11 14 10 37 21 36 17 3 23 28 19 20 29 12 (a) Construct a frequency distribution with approximately eleven classes. (You may want to use a lower class limit of 0 ) (b) Use excel to construct a frequency histogram from this frequency distribution (c) Construct a relative histogram distribution for the same number of classes. (d) Use excel to construct a relative frequency histogram from this relative frequency distri- bution (e) Are the histograms skewed to the left, skewed to the right or approximately symmetric?