Queens College (Ayer-Tena campus)
Statistics Assignment shishay Hailemelekot (MSc/MA )
1/ According to the recent U.S. Federal Highway Administration Highway
Statistics, the percentages of freeways and expressways in various road
mileage–related highway pavement conditions are as follows: Poor 10%,
Mediocre 32%, Fair 22%, Good 21%, and Very good 15%.
(a) Construct a bar graph.
(b) Construct a pie chart
2/ the following data give the letter grades of 20 students enrolled in a
statistics course.
ABFACCDABF
CDBABAFBCA
(a) Construct a bar graph.
(b) Construct a pie chart
3/ According to the U.S. Bureau of Labor Statistics (BLS), the median weekly
earnings of fulltime wage and salary workers by age for the third quarter of
1998 is given in Table 1.
T
a
b
l
e
1
16 to 19 years
$
2
6
0
20 to 24 years
$
3
3
4
25 to 34 years
$
4
9
8
35 to 44 years
$
6
0
0
45 to 54 years
$
6
2
8
55 to 64 years
$
6
0
5
65 years and over
$
3
9
3
Construct a pie chart and bar graph for these data and interpret. Also,
construct a Paretochart.
4/ the following table give radon concentration in pCi/liter obtained from 40
houses in acertain area.
2.90.6 13.5 17.1 2.8 3.8 16.0 2.1 6.417.2
7.9 0.5 13.7 11.5 2.9 3.6 6.1 8.8 2.2 9.4
15.9 8.89.811.5 12.3 3.78.913.07.911.7
6.2 6.9 12.8 13.72.7 3.5 8.3 15.9 5.16.0
(a) Construct a frequency distribution
(b) Construct a frequency histogram and interpret.
(c) Construct a pie chart and interpret
5/ the following data give the mean of SAT Mathematics scores by state for
1999 for a randomlyselected 20 states.
558 503 565 572 546 517 542 605 493 499
568 553 510 525 595 502 526 475 506 568
(a) Construct a stem-and-leaf display and interpret.
(b) Construct a frequency histogram and interpret.
(c) Construct a pie chart and interpret.