Question

**Eating out.** A survey asked 849 people how many
times per week they dine out at a restaurant. The results are
presented in the following table.

Number of Times |
Frequency |

0 |
116 |

1 |
232 |

2 |
246 |

3 |
146 |

4 |
54 |

5 |
23 |

6 |
26 |

7 |
6 |

Consider the 849 people to be a population. Let X be the number of times per week a person dines out for a person sampled at random from this population.

a.) compute the probability distribution table.

b.) Find the probability that a person dines out exactly 2 times.

c.) Find the probability that a person dines out at least 5 times.

d.) Find the probability that a person dines out more than 2 times.

e.) Find the probability that a person dines out between 3 and 6 times.

f.) Compute the mean.

g.) Compute the standard deviation.

Answer #1

Professor Jones took a random sample of 8 students and
asked them how many times per week they dine out. The responses
were:
2
2
3
4
5
5
77
88
Find the 95% confidence interval for the population
mean.

A researcher asks a large population of people (several
thousand) how many times per year they attend religious services.
The mean number is 17 and the standard deviation is 7. You recruit
a random sample of 144 people and ask them the same question. The
mean for the sample is 17.75. First, compute the standard error of
the mean. Next, conduct a z test and use Table Z to find the area
of the normal curve that falls beyond the...

110 adults with gum disease were asked the number of times per
week they used to floss before their diagnoses. The (incomplete)
results are shown below:
# of times floss per week
Frequency
Relative Frequency
Cumulative Frequency
0
10
1
15
0.1364
2
15
0.1364
40
3
16
0.1455
56
4
14
0.1273
70
5
12
0.1091
82
6
15
0.1364
97
7
13
0.1182
110
a. Complete the table (Use 4 decimal places when applicable)
b. What is the...

70 adults with gum disease were asked the number of times per
week they used to floss before their diagnoses. The (incomplete)
results are shown below:
# of times floss per week
Frequency
Relative Frequency
Cumulative Frequency
0
9
0.1286
9
1
0.0714
14
2
7
0.1
21
3
11
0.1571
32
4
12
0.1714
44
5
10
0.1429
6
7
61
7
9
0.1286
70
a. Complete the table (Use 4 decimal places when applicable)
b. What is the...

Question 5
In a survey on study habits, students at a local college were
asked whether they listened to music while studying. The following
table was constructed.
Listens to Music
Does Not Listen to Music
Male
49
16
Female
5
31
Find the probability that a randomly selected student listens to
music while studying given that the student is female.
Write only a number a your answer. Round to two decimal places
(for example: 0.73). Do not write as a...

I asked 6 people how many hours they spent playing tennis per
week. These individuals said 3, 2, 4, 5, 6, and 1. What is the test
statistic with a significance level of .1?
Please show how you did this as I am lost.

On a recent survey, 400 working Americans were asked
“How many days do you feel stressed or anxious at
work?”
Number of Days
Frequency
0
60
1
35
2
15
3
120
4
70
5
100
a) What is the probability that a randomly selected
person feels stressed at work three days per week?
b) Conditional on feeling stressed at least once per
week, what is the probability that a randomly selected person is
stressed more than three days per...

A survey was conducted that asked 1008 people how many books
they had read in the past year. Results indicated that x
overbarequals11.6 books and sequals16.6 books. Construct a 99%
confidence interval for the mean number of books people read.
Interpret the interval. LOADING... Click the icon to view the table
of critical t-values. Construct a 99% confidence interval for the
mean number of books people read and interpret the result. Select
the correct choice below and fill in the...

A survey was conducted that asked
10111011
people how many books they had read in the past year. Results
indicated that
x overbarxequals=11.411.4
books and
sequals=16.616.6
books. Construct a
9595%
confidence interval for the mean number of books people read.
Interpret the interval.
LOADING...
Click the icon to view the table of critical t-values.
Construct a
9595%
confidence interval for the mean number of books people read and
interpret the result. Select the correct choice below and fill in
the...

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10131013
people how many books they had read in the past year. Results
indicated that
x overbarxequals=11.211.2
books and
sequals=16.616.6
books. Construct a
9090%
confidence interval for the mean number of books people read.
Interpret the interval.
LOADING...
Click the icon to view the table of critical t-values.
Construct a
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confidence interval for the mean number of books people read and
interpret the result. Select the correct choice below and fill in
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