An economist is studying the job market in Denver-area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y represent the number of entry-level jobs in the same neighborhood. A sample of six Denver neighborhoods gave the following information (units in hundreds of jobs). x 16 33 50 28 50 25 y 2 3 6 5 9 3 Draw a scatter diagram displaying the data. You do not need to share your diagram. Verify the given sums∑x=202, ∑x2=7754, ∑y=28, ∑y2=164,   and ∑xy=1096 Find  a  and  b.  Then find the equation of the least-squares line yˆ=a+bx. For a neighborhood with  x=40 jobs, how many are predicted to be entry-level jobs?

1. Tommy's cab company transports riders using 2 routes. Use the following data to determine the mean driving time and the variance in the driving time. Route 1 54 69 58 47 72 56 66 Route 2 61 62 63 53 58 65 59 67 1. Run Excel descriptive statistics for the data above. 1. Comment on any differences between the data.

The price drivers pay for gasoline often varies a great deal across regions throughout the United States. The following data show the price per gallon for regular gasoline for a random sample of gasoline service stations for three major brands of gasoline (Shell, BP, and Marathon) located in eleven metropolitan areas across the upper Midwest region (OhioGasPrices.com website, March 18, 2012). Click on the datafile logo to reference the data. DATA file Shell BP Metropolitan Area Marathon Akron, Ohio Cincinnati, Ohio Cleveland, Ohio Columbus, Ohio Ft. Wayne, Indiana Indianapolis, Indiana Lansing, Michigan Lexington, Kentucky Louisville, Kentucky Muncie, Indiana Toledo, Ohio 3.77 3.72 3.87 3.76 3.78 3.87 3.89 3.79 3.83 3.83 3.85 3.77 3.83 3.85 3.93 3.84 3.84 4.04 3.87 3.87 3.99 3.79 3.78 3.81 3.69 3.78 3.84 3.84 3.83 3.79 3.79 3.86 3.86 Use a = .05 to test for any significant difference in the mean price of gasoline for the three brands. Round SS to 6 decimals, MS to 6 decimals, F to 2…

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The table to the right shows data found at a government census​ website, under a​ "Did You​ Know" panel. What type of data source is the information presented here based​ on?   Private Sector Total Employment in a State All 2008 Q2 2009 Q2 Change Female 537,290 517,948 −3.6​% Male 504,214 477,491 −5.3​% Retail Trade       Female 168,942 146,473 −13.3​% Male 162,502 144,302 −11.2​%       Question content area bottom Part 1 Choose the correct answer below.     A. The information is the outcome of an experiment that was conducted.   B. The information is the result of an observational study that was conducted.   C. The information is the result of a survey that was conducted.   D. The information is collected via ongoing business activities.   E. The information is distributed by an organization or individual.

4. Draw a line / curve of best fit for the following sets of data & identify if they are linear, quadratic or exponential: 2500 1500 1000 500 300 200 -100 25 50

The table to the right gives the cost of living index (COLI) for six East Coast counties and six Midwest counties (using an index where 100 represents the average cost of living for all A participating cities with a population of more than 1.5 million). Answer parts (a) through (e) below. B a. Find the mean, median, and range for each of the two data sets. The mean for the East Coast Counties is (Type an integer or decimal rounded to two decimal places as needed.) EUCEY с D F East Coast Counties 104.9 128.7 314.2 134.1 123.5 141.1 DYWXYN Midwest Counties 96.2 92.7 94.4 87.3 95.8 228.3

A record of a chess match records the chess piece used, the location of the piece and the length of time used to make the move. Classify each variable as qualitative or quantitative. A sample data table is listed below Piece Location pawn B3 rook C7 queen A6 0000 Move time (in seconds) 65 84 53 Piece - qualitative; location - quantitative; move time - quantitative Piece - quantitative; location - quantitative; move time - qualitative Piece - qualitative; location - qualitative; move time - quantitative Piece - qualitative; location - quantitative; move time - qualitative

Erin is married to Glen Mills. Erin earns an income of 500. Glen earns 400. Glen and Erin live with their two dependent children who earn no income. Vaughan lives alone and earns an income of 100. 1. Statistics Canada would report the variance in income for this population is equal to? 2. Statistics Canada would report the range of incomes for this population is equal to?