Question
In: Advanced Math
1. For 25 randomly selected students, ( a) how many ways do all the 25 students...
1. For 25 randomly selected students, (
a) how many ways do all the 25 students have different birthday?
b) find the probability that at least two students have the same birthday.
c) find the probability that only two share the same birthday.
d) for probability computed above identify the sample space, the experiment and outcomes.
e) can a random variable be used for the case above? If yes list the possible values for the variable.
I figured out a through c but i need D and E answered please!!
Solutions
Colby Messinger answered 2 years agoRelated Solutions
IQ of a student population follows N100,15^2) If 100 students are randomly selected how many are...
IQ
of a student population follows N100,15^2) If 100 students are
randomly selected how many are expected to have an IQ over
115
1. You have sampled 25 randomly selected students to find the mean test score. A 95%...
1. You have sampled 25 randomly selected students to find the
mean test score. A 95% confidence interval for the mean came out to
be between 85 and 92. Which of the following statements gives a
valid interpretation of this interval?
1)If this procedure were to be repeated many times, 95% of the
confidence intervals found would contain the true mean score.
2)If 100 samples were taken and a 95% confidence interval were
found, 95 of them would be between...
A sample of 20 Ohio University students were randomly selected and asked, “How many phone calls...
A sample of 20 Ohio University students were randomly selected
and asked, “How many phone calls did you receive last night?” The
numbers below are their responses.
1 2 0 2 4 2 3 4 5 3
0 4 5 6 3 10 7 6 7 11
Compute the IQR of the distribution.
Answers:
a. 6
b. 3
c. 4
d. 2
60 randomly selected students were asked how many siblings were in their family. Let X =...
60 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:
Siblings
Frequency
1
13
2
22
3
15
4
6
5
3
6
0
7
1
Round your answers to two decimal places.
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 had...
A sample of 20 Ohio University students were randomly selected and asked, “How many phone calls...
A sample of 20 Ohio University students were randomly selected
and asked, “How many phone calls did you receive last night?” The
numbers below are their responses.
1 2 0 2 4 2 3 4 0
5 3 4 5 6 3 10 7 6 7 11
Compute the standard deviation of the
distribution.
Answers:
a. 6.4
b. 2.51
c. 3.16
d. 2.97
54 randomly selected students were asked how many siblings were in their family. Let X -...
54 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.
# of Siblings
0
1
2
3
4
5
Frequency
5
9
10
13
10
7
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 at least 1 siblings?
_____%...
52 randomly selected students were asked how many siblings were in their family. Let X represent...
52 randomly selected students were asked how many siblings were
in their family. Let X represent the number of pairs of siblings in
the student's family. The results are as follows:
# of Siblings
0
1
2
3
4
5
6
Frequency
10
11
7
4
5
10
5
Round all your answers to 4 decimal places where
possible.
The mean is:
The median is:
The sample standard deviation is:
The first quartile is:
The third quartile is:
What percent...
A randomly selected sample of 14 students who stayed up all night to study for an...
A randomly selected sample of 14 students who stayed up all
night to study for an exam received an average grade of 68% with a
standard deviation of 8%. Another randomly selected sample of 12
students who wrote the same exam after a good night’s sleep
received an average grade of 75% with a standard deviation of 7%.
At a 5% significance level, does the sample provide enough
statistical evidence to support a claim that students who stay
awake all...
There are 12 students in a party. Five of them are girls. In how many ways...
There are 12 students in a party. Five of them are girls. In how
many ways can these 12 students be arranged in a row if (i) there
are no restrictions? (ii) the 5 girls must be together (forming a
block) (iii) no two girls are adjacent? (iv) two particular boys A
and B, there are no boys but exactly 3 girls?
The grade point average for 10 randomly selected college students is: (Please show all work and...
The grade point average for 10 randomly selected college
students is: (Please show all work and label if it's answer a, b,
c.)
2.9, 3.1, 3.4, 3.6, 3.1, 4.0, 2.5, 3.7, 3.0, 2.5 (Assume the
sample is taken from a normal distribution)
a) Find the sample mean. (Show all work)
b) Find the sample standard deviation.
c.) Construct a 99% C.I. for the population mean.
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