1) Students reported the following earnings last month (in $):

211 228 243 261 279 287 311 314 329 347 368 379 391 393 411 446 508 542 687 729

a) Create a frequency distribution for the data using 200-249 for the first class and

grouping by 50's.

b) Explain why the first two classes in the table should not be 200-250, 250-300.

c) Explain why the first two classes in the table should not be 200-250, 251-301.

2) Times (in sec.) taken by two sets of individuals to complete a motor skills task are

given below.

College students (sample size n = 25):

50 42 52 43 28 35 47 51 45 52 38 20 38 52 46 29 38 44 48 44 46 43 35 43 43

Factory workers (sample size n = 37):

23 39 38 44 26 33 39 40 42 53 52 47 36 34 22 29 34 45 42 38 37 28 47 53 33

37 39 44 29 31 42 46 38 43 40 36 34

a) Construct a frequency table, including relative frequencies, for each sample above.

For each table, use 20-24 as your first class and continue to group by 5's from there.

b) Draw a histogram for each sample.

c) Describe the distribution for each sample, using the scheme ("center, spread, shape")

discussed on the "Interpreting Histograms" class handout.

d) Which of the two sets of individuals, on the whole, completed the task in less time?

Explain how you decide.

3) In a survey asking drivers to list their complaints about other drivers, the top

complaints were: tailgating, mentioned by 22% of those surveyed; not using turn signals

(19%), being cut off (16%), other drivers driving too slowly (11%), and other drivers being

rude (8%). Draw a Pareto chart for the data.

4) a) Draw a stem and leaf plot for the following data (# of hospitals in each state):

ALABAMA 119 KENTUCKY 107 NORTH DAKOTA 47

ALASKA 16 LOUISIANA 136 OHIO 193

ARIZONA 61 MAINE 38 OKLAHOMA 113

ARKANSAS 88 MARYLAND 51 OREGON 66

CALIFORNIA 440 MASSACHUSETTS 101 PENNSYLVANIA 236

COLORADO 71 MICHIGAN 175 RHODE ISLAND 12

CONNECTICUT 35 MINNESOTA 148 SOUTH CAROLINA 68

DELAWARE 08 MISSISSIPPI 102 SOUTH DAKOTA 52

DIST. OF COLUMBIA 11 MISSOURI 133 TENNESSEE 122

FLORIDA 227 MONTANA 53 TEXAS 421

GEORGIA 162 NEBRASKA 90 UTAH 42

HAWAII 19 NEVADA 21 VERMONT 15

IDAHO 41 NEW HAMPSHIRE 27 VIRGINIA 98

ILLINOIS 209 NEW JERSEY 96 WASHINGTON 92

INDIANA 113 NEW MEXICO 37 WEST VIRGINIA 59

IOWA 123 NEW YORK 231 WISCONSIN 129

KANSAS 133 NORTH CAROLINA 117 WYOMING 27

b) Briefly describe the distribution of the # of hospitals per state in terms of center,

spread, and shape; also identify any outliers