In: Statistics and Probability

The table below shows the results of a survey that asked

2864 people whether they are involved in any type of charity work. A person is selected at random from the sample. Complete parts (a) through (d).

Frequently Occasionally Not at
all Total

Male 228 458 792 1478

Female 205 440 741 1386

Total 433 898 1533 2864

(a) Find the probability that the person is frequently or occasionally involved in charity work.

Upper P left parenthesis being frequently involved or being occasionally involved right parenthesis equals nothingP(being frequently involved or being occasionally involved)=0.4620.462

(Round to the nearest thousandth as needed.)

(b) Find the probability that the person is female or not involved in charity work at all.

Upper P left parenthesis being female or not being involved right parenthesis equals nothingP(being female or not being involved)=

(Round to the nearest thousandth as needed.)

(c) Find the probability that the person is male or frequently involved in charity work.

Upper P left parenthesis being male or being frequently involved right parenthesis equals nothingP(being male or being frequently involved)=

(Round to the nearest thousandth as needed.)

(d) Find the probability that the person is female or not frequently involved in charity work.

Upper P left parenthesis being female or not being frequently involved right parenthesis equals nothingP(being female or not being frequently involved)=

(Round to the nearest thousandth as needed.)

The table below shows the results of a survey that asked
28632863
people whether they are involved in any type of charity work. A
person is selected at random from the sample. Complete parts (a)
through (e).
Frequently
Occasionally
Not at all
Total
Male
224
456
791
1471
Female
205
440
747
1392
Total
429
896
1538
2863
(a) Find the probability that the person is frequently or
occasionally involved in charity work.
Upper P left parenthesis being frequently involved...

The table below shows the results of a survey that asked 2867
people whether they are involved in any type of charity work. A
person is selected at random from the sample. Complete parts (a)
through (b).
Frequently
Occasionally
Not at all
Total
Male
221
453
792
1466
Female
208
450
743
1401
Total
429
903
1535
2867
(a) Find the probability that the person is frequently or
occasionally involved in charity work.
P(being frequently involved or being occasionally involved)=...

The table shows the results of a survey that asked 2850 people
whether they were involved in any type of charity work. A person is
selected at random from the sample. Find the probability of each
event. Give your answers as simplified fractions or as decimals
rounded to 3 places.
Frequently
Occasionally
Not at all
Total
Male
221
456
795
1472
Female
207
430
741
1378
Total
428
886
1536
2850
a) What is the probability that the person is...

A) The table below shows the results of a survey that asked 1052
adults from a certain country if they would support a change in
their country's flag. A person is selected at random. Complete
parts (a) through (d).
Support
Oppose
Unsure
Total
Males
151
332
10
493
Females
244
296
19
559
Total
395
628
29
1052
(a) Find the probability that the person opposed the change or
is female.
(b) Find the probability that the person supports the...

The table below shows the results of a survey that asked 1027
adults from a certain country if they favored or opposed a tax to
fund education. A person is selected at random. Complete parts (a)
through (c).
Support
Oppose
Unsure
Total
Males
155
317
99
481
Females
229
291
26
546
Total
384
608
35
1027
1. Find the probability that the person opposed the tax or is
female.
2. Find the probability that the person supports the tax...

The table below shows whether a random collection of people will
respond to a survey or not, in different age groups. Test the claim
that cooperation of a subject and the age of a subject are
independent. χ2R = 15.086
Age
18-21
22-29
30-39
40-49
50-59
60 and over
responded
73
255
245
136
138
202
refused
11
20
33
16
27
49
Critical Values: z0.005 = 2.575, z0.01 = 2.325, z0.025 =
1.96, z0.05 = 1.645
When d.f.=6: t0.005...

The contingency table below shows the results of a survey of
video viewing habits by age.
Video Viewing Platform Preferred
Viewer Age
Mobile/Laptop Device
TV
Screen
Row Total
18–34
35
38
73
35–54
9
9
18
55+
3
6
9
Column
Total
47
53
100
Find the following probabilities or percentages:
(a) Probability that a viewer is aged 18–34.
(Round your answer to 2 decimal places.)
Probability
(b) Probability that a viewer prefers watching videos on a
TV...

The contingency table below shows the results of a survey of
video viewing habits by age.
ideo Viewing Platform Preferred
Viewer Age
Mobile/Laptop Device
TV Screen
Row Total
18–34
30
38
68
35–54
10
10
20
55+
3
9
12
Column Total
43
57
100
Find the following probabilities or percentages:
(a) Probability that a viewer is aged 18–34.
(Round your answer to 2 decimal places.)
Probability
(b) Probability that a viewer prefers watching videos on a
TV...

The contingency table below shows the results of a survey of
video viewing habits by age. Video Viewing Platform Preferred
Viewer Age Mobile/Laptop Device TV Screen Row Total 18–34 34 34 68
35–54 12 12 24 55+ 2 6 8 Column Total 48 52 100 Find the following
probabilities or percentages: (a) Probability that a viewer is aged
18–34. (Round your answer to 2 decimal places.) Probability (b)
Probability that a viewer prefers watching videos on a TV screen.
(Round...

A) A survey asked 264 people what alternative transportation
modes they use. The results are below.
83 walk
133 use the bus
132 ride a bicycle
41 walk and use the bus
36 walk and ride a bicycle
75 ride the bus and ride a bicyle
25 said they use all three modes of transportation
-How many people only ride the bus?
-How many people don't use any alternate transportation?
B) A survey asked buyers whether color, size, or brand...

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