Author Question: 252 randomly sampled college students were asked, among other things, to estimate their college ... (Read 173 times)

renzo156 · **on:** Jun 24, 2018

252 randomly sampled college students were asked, among other things, to estimate their
college grade point average (GPA). The responses are shown in the stem-and-leaf plot shown
below.

Notice that a GPA of 3.65 would be indicated with a stem of 36 and a leaf of 5 in the plot.
How many of the students who responded had GPA's that exceeded 3.55?
Stem and Leaf Plot of GPA
Leaf Digit Unit = 0.01 Minimum 1.9900
19 9 represents 1.99 Median 3.1050
Maximum 4.0000
Stem Leaves
1 19 9
5 20 0668
6 21 0
11 22 05567
15 23 0113
20 24 00005
33 25 0000000000067
46 26 0000005577789
61 27 000000134455578
79 28 000000000144667799
88 29 002356777
116 30 0000000000000000000 011344559
(19 ) 31 0000000000112235666
117 32 0000000000000000345 568
95 33 000000000025557
80 34 0000000000000000333 444566677889
49 35 000003355566677899
31 36 000005
25 37 022235588899
13 38 00002579
5 39 7
4 40 0000
252 cases included
A) 39 B) 19 C) 49 D) 31

Question 2

A survey was conducted to determine how people feel about the quality of programming
available on television. Respondents were asked to rate the overall quality from 0 (no quality at
all) to 100 (extremely good quality).

The stem-and-leaf display of the data is shown below.
Stem Leaf
3 1 6
4 0 3 4 7 8 9 9 9
5 0 1 1 2 3 4 5
6 1 2 5 6 6
7 1 4
89
5
What percentage of the respondents rated overall television quality as very good (regarded as
ratings of 80 and above)?
A) 1 B) 5 C) 4 D) 20