Question

Suppose that the employment rate of UF-students is 70% and that 8 UF-students were randomly surveyed if they are employed.

a)

What is the probability that exactly 6 students are employed?

b)

What is the probability that at least 4 of them are employed?

c)

What is the probability that at most 6 of them are employed?

Answer #1

4. Suppose that the employment rate of USC-students is 70% and
that 8 USC-students were randomly surveyed if they are
employed.
a)
What is the probability that exactly 6 students are
employed?
b)
What is the probability that at least 4 of them are
employed?
c)
What is the probability that at most 6 of them are employed?

According to government data, 70% of employed women have never
been married. Rounding to 4 decimal places, if 15 employed women
are randomly selected:
a. What is the probability that exactly 2 of them have never
been married?
b. That at most 2 of them have never been married?
c. That at least 13 of them have been married?

American Airlines' flights from Boston to Atlanta are on time
70% of the time. Suppose 8 flights are randomly selected, and the
number on-time flights is recorded. Use the binomial distribution
to compute the following.
(a) The probability that exactly 2 flights are on
time is
(b) The probability that more than 7 flights are
on time is
(c) The probability that at most 4 flights are on
time is
Round all answers to at least 4 decimal places.

about 70% of all students have a laptop. randomly sample of 20
students,
probability
1. exactly 16 have a laptop?
2. at least 18 have a laptop?
3. fewer than 18 have laptop?

70% of all Americans are home owners. If 44 Americans are
randomly selected, find the probability that
a. Exactly 30 of them are are home owners.
b. At most 32 of them are are home owners.
c. At least 32 of them are home owners.
d. Between 29 and 33 (including 29 and 33) of them are home
owners.

Suppose that 56% of all college students are female and that we
randomly select 15 college students. a) What is the probability
that exactly 8 of the students will be female? b) What is the
probability that 10 or more of the students will be female? c) What
is the mean number μ of females in such randomly selected groups of
15 students? d) What is the standard deviation σ of the number of
females in such randomly selected groups...

A group of students were surveyed about the number of times they
went to a movie theater last year. Their responses are summarized
in the frequency table below.
How many students responded to the survey?
Number of Movies
Frequency
0−1
4
2−3
8
4−5
7
6−7
9
8−9
5
10 or more
7

55 randomly selected students were asked how many siblings were
in their family. Let X - the number of pairs of siblings in the
student's family. The results are as follows:
# of Siblings
0
1
2
3
4
5
Frequency
10
6
14
8
6
11
Round all your answers to one decimal place.
The mean is:
The median is:
The sample standard deviation is:
The first quartile is:
The third quartile is:
What percent of the respondents have...

In a sample of 100 students taken randomly from QU, 70 of them
have Twitter account, 80 have Facebook account, and 60 of them have
both accounts. If a student is randomly selected:
The probability that he/she has at least one account is
The probability that he/she has no Twitter account is
The probability that he/she has Twitter account only is
The probability that he/she has neither Twitter nor Facebook
account is
The probability that he/she has either Twitter or...

According to government data, 51% of employed women have never
been married. Rounding to 4 decimal places, if 15 employed women
are randomly selected:
a. What is the probability that exactly 2 of them have never
been married?
b. That at most 2 of them have never been married?
c. That at least 13 of them have been married?

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