Students at a university have the option to stream TV shoes over the internet or to watch cable TV. A survey of 100 college students produced the following results: In the past 30 days, 65 people have streamed TV shows, 45 have watched cable TV, and 30 have done both. A During this 30 -day period, how many people in the survey have streamed TV shows but not watched cable TV? B How many have watched cable TV but not streamed TV shows? C How many have done neither? D Organize this information in a table.
Students at a university have the option to stream TV shoes over the internet or to watch cable TV. A survey of 100 college students produced the following results: In the past 30 days, 65 people have streamed TV shows, 45 have watched cable TV, and 30 have done both. A During this 30 -day period, how many people in the survey have streamed TV shows but not watched cable TV? B How many have watched cable TV but not streamed TV shows? C How many have done neither? D Organize this information in a table.
Solution Summary: The author explains how to determine the number of people that streamed TV shows but did not watch cable TV in a survey of 100 college students.
Students at a university have the option to stream TV shoes over the internet or to watch cable TV. A survey of
100
college students produced the following results: In the past
30
days,
65
people have streamed TV shows,
45
have watched cable TV, and
30
have done both.
A
During this
30
-day period, how many people in the survey have streamed TV shows but not watched cable TV?
B
How many have watched cable TV but not streamed TV shows?
Example 4 (Part 2) We can use Statkey to take 50 different random samples of size 20 each, find the mean of
each sample, and compute a confidence interval for each one. The graph of the sampling distribution of the means
is on the left below, and that of the 50 confidence intervals is on the right.
1. What does each dot on the left hand dotplot represent?
StatKey Sampling Distribution for a Mean
Percent with Internet Access (Countries) ▾
Show Data Table Edit Data
Choose samples of size n =
20
Upload File
Change Column(s)
Generate 1 Sample
Generate 10 Samples
Generate 100 Samples
Generate 1000 Samples
Reset Plot
Sampling Dotplot of Mean
Left Tail Two-Tail Right Tail
60
50
40
40
30
20
20
10
samples = 50
mean = 41.626
std. error = 5.089
:
.:
:
::
0
25
30
35
40
45
50
55
60
41.626
Data Plots
Confidence Intervals
95%->
Confidence Intervals
Coverage
48/50 = 96%
20
40
60
80
2. Circle the confidence intervals that failed to capture the true mean.
3. Circle the sample means that produced those…
Can you prove by induction on n for the following
Chapter 7 Solutions
Finite Mathematics for Business, Economics, Life Sciences and Social Sciences
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