1.Forty bus drivers were asked how many hours they spend each day running their routes (rounded to the nearest hour). Find the65th percentile.

Time spent on route ( in hours )Frequency Cumulative Relative Frequency2120.3 ( = 30% )3140.65 ( = 65%)4100.9 ( = 90% )541.0 ( = 100% )

2.The following data set shows the heights in inches for the boys in a class of 40 students:66; 66; 67; 67; 68; 68; 68; 68; 68; 69; 69; 69; 70; 71; 72; 72; 72; 73; 73; 74.

The following data set shows the heights in inches for the girls in a class of 40 students: 61; 61; 62; 62; 63; 63; 63; 65; 65; 65; 66; 66; 66; 67; 68; 68; 68; 69; 69; 69. Construct abox plotfor each data set, and state which box plot has the wider spread for themiddle 50%of the data.

3.The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest: 16; 17; 19; 20; 20; 21; 23; 24; 25; 25; 25; 26; 26; 27; 27; 27; 28; 29; 30; 32; 33; 33; 34; 35; 37; 39; 40. Calculate themean, medianandmode.

4. For the following data, State whether the data aresymmetrical, skewedto theleft, or skewed to theright: 16; 17; 19; 22; 22; 22; 22; 22; 23.