1.

.

Isabel made the estimates listed in
the table at right for the year each
item was invented.

a.	Create a scatter plot of data points with coordinates having the form (actual year, estimated year).
b.	Are her estimates in general higher or lower than the actual year that the item was invented?
c.	Draw the line of best fit and from this estimate of the estimated year an item invented in the actual year of 2010 based on this data.

Invention Dates

Item	Actual year	Estimated year
Telephone	1876	1905
Color television	1928	1960
Video disk	1972	1980
Pacemaker	1952	1945
Motion picture	1893	1915
Ballpoint pen	1888	1935
Aspirin	1899	1917
Graphing calculator	1985	1980
Compact disc	1972	1990
Car radio	1929	1940

(2000 World Almanac, pp. 609– 610)

2)Twenty-three students were asked how many
pages they had read in a book currently
assigned for class. Here are their responses:
{24, 87, 158, 227, 437, 79, 93, 121, 111, 118, 12,
25, 284, 332, 181, 34, 54, 167, 300, 103, 128,
132, 345}.

      Mean Annual Wages, 1998

Level of education	Amount ($)
Did not finish high school	18,913
High school diploma only	25,257
Two-year degree (AA/AS)	33,765
Bachelor’s degree (BA/BS)	45,390
Master’s degree (MA/MS)	52,951
Doctorate degree	75,071

(U.S. Census 2000)

Leading Scorers in NCAA Tournament History
(Women’s Basketball, Through 1999–2000 Season)

Player, college	Total points
Chamique Holdsclaw, Tennessee	479
Bridgette Gordon, Tennessee	388
Cheryl Miller, USC	333
Janice Lawrence, Louisiana Tech	312
Penny Toler, Long Beach State	291
Dawn Staley, Virginia	274
Cindy Brown, Long Beach State	263
Venus Lacy, Louisiana Tech	263
Clarissa Davis, Texas	261
Janet Harris, Georgia	254

The table shows the percentages of the most common elements found in the human body.

Elements in the Human Body

Oxygen	Carbon	Hydrogen	Nitrogen	Calcium	Phosphorus	Other
65%	18%	10%	3%	2%	1%	1%

Time (min)	Number of students
1	2
3	2
5	6
6	1
8	6
10	7
12	3
14	2
15	1

Plot and answer the following questions based on the plot.

How many students in this class?

Combined travel time ?

Average travel time?

.

This table lists median weekly earnings of full-time workers by
occupation and gender for 2000.

Median Weekly Earnings, 2000

Occupation	Men	Women
Managerial and professional specialty	$999	$697
Executive, administration, and managerial	995	684
Professional specialty	1001	708
Technical, sales, and admin. support	653	451
Technicians and related support	754	539
Sales occupations	683	379
Administrative support including clerical	552	455
Service occupations	405	313
Protective service	636	470
Precision production, craft, and repair	622	439
Mechanics and repairers	645	588
Operators, fabricators, and laborers	492	353
Machine operators, assemblers, and inspectors	498	353
Transportation and material moving	555	421
Handlers, equipment cleaners, helpers, and laborers	401	329
Farming, forestry, and fishing	342	288

(http://stats.bls.gov)

a.	Make two box plots, one for men's salaries and one for women's salaries, above the same number line. Use them to compare the two data sets. Use the terms you have learned in this chapter.
B	What does the data tell you about women's and men's wages for the same type of work in 2000?
c.	Do the box plots help you identify characteristics of the data better than the table does? Are there any aspects of the data that are better seen in the table?
d.	How could you use the box plots to explain the slogan "Equal pay for equal work"?

2.	Thirty students were asked at random to pick a number from 0 to 20. Here are the results:
		{12, 7, 8, 3, 5, 7, 10, 13, 7, 10, 2, 1, 11, 12, 17, 4, 11, 7, 6, 18, 14, 17, 11, 9, 1, 12, 10, 12, 2, 15}

histogram