Office occupancy in a city is an indication of the economic health of the region in which it is located. Suppose a random sample of offices in Boston and Chicago was selected and the number of vacancies was recorded. Round all answers to four decimal places.

Carmen and Rosanna are two employees in an electronics store. The store manager has put an emphasis on increasing the number of applications for the store credit card. The manager randomly selected 24 weeks for each employee and recorded the number of completed applications for each week, which is provided in the samples below. Each employee completed 21 applications in one of the weeks selected. Use Excel to calculate each employee's z-score for completing 21 applications. Round your answers to two decimal places. Carmen Rosanna11 56 1115 613 185 1114 1416 521 208 1110 97 1416 1513 1310 619 2118 95 1817 310 126 1712 1214 419 1017 8

Fifty randomly selected car salespersons were asked the number of cars they generally sell in one week. Nine people answered that they generally sell three cars; thirteen generally sell four cars; ten generally sell five cars; seven generally sell six cars; eleven generally sell seven cars. Complete the table. Data Value (# cars) Frequency Relative Frequency Cumulative Relative Frequency 3 4 6. 7

Explain the relation between a population and a sample. What characteristics should a sample have to be representative of the population?

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