Question
In: Statistics and Probability
From a group of 9 freshmen and 11 sophomores five students will be selected at random....
From a group of 9 freshmen and 11 sophomores five students will be selected at random. The random variable x represents the number of freshman selected.
A)give the probability distribution
B)give the probability that more sophomores than freshman are selected
Solutions
orchestra answered 2 years agoRelated Solutions
A study group is to be selected from 5 freshmen, 7 sophomores, and 4 juniors. a....
A study group is to be selected from 5 freshmen, 7 sophomores,
and 4 juniors. a. If a study group is to consist of 4 freshmen, 6
sophomores, and 2 juniors, how many different ways can the study
group be selected? b. If a study group consisting of 6 students is
selected, what is the probability that the group will consist of 2
freshmen, 3 sophomores, and 1 junior?
Q1. In a second-semester English class, 35% of the students are sophomores and the rest freshmen;...
Q1. In a second-semester English class, 35% of the students are
sophomores and the rest freshmen; 30% of the sophomores are
repeating the course and 20% of the freshmen gained admission to
the course by advanced placement. The professor randomly selects a
student to comment on the assignment. (Round your answers to three
decimal places.)
Find the probability that the professor selects a freshman who
gained advanced placement admission to the class.?
A) In a group of college students, 60...
Six names will be drawn from a group of H+2 freshmen, F+L sophomores, 2*(H-1) juniors, and...
Six names will be drawn from a group of H+2 freshmen, F+L
sophomores, 2*(H-1) juniors, and 2*H seniors. Calculate (rounding
your answers to three decimal places) the probability that:
a. freshmen, sophomores and juniors are equally represented.
Ans.___________
the number of freshmen drawn equates the number of sophomores
and juniors drawn.Ans.___________
the ratio of drawn seniors to drawn sophomores is 3:1.
Ans.___________
the ratio of drawn juniors to drawn freshmen is at least 3:1.
Ans.___________
H= 6
T= 21
F=6...
Six names will be drawn from a group of H+2 freshmen, F+L sophomores, 2*(H-1) juniors, and...
Six names will be drawn from a group of H+2 freshmen, F+L
sophomores, 2*(H-1) juniors, and 2*H seniors. Calculate (rounding
your answers to three decimal places) the probability that:
a. freshmen, sophomores and juniors are equally represented.
Ans.___________
b. the number of freshmen drawn equates the number of sophomores
and juniors drawn. Ans.___________
c. the ratio of drawn seniors to drawn sophomores is 3:1.
Ans.___________
d. the ratio of drawn juniors to drawn freshmen is at least 3:1.
Ans.___
H...
A group of n = 25 students was selected at random for studies related to the...
A group of n = 25 students was selected at random for studies
related to the amount of time they spent for exam preparations.
Educators assume that individual records are normally distributed
with entirely unknown parameters (μ, σ). Sample summaries (in
minutes per week) were obtained as
Sample Mean =X =90 and Sample SD =s=20 For hypothesis testing,
set significance level = α = 0.01̄
To test whether μ < 100, what critical value (or values) are
you going to...
Rework problem 25 from section 3.2 of your text, involving choosing freshmen, sophomores, and juniors. For...
Rework problem 25 from section 3.2 of your text, involving
choosing freshmen, sophomores, and juniors. For this problem,
assume that three students are chosen from 3 freshmen, 6
sophomores, and 5 juniors. What is the probability of selecting 2
freshmen and 1 junior given that at least one freshman will be
selected?
From the digits 0,1,2,3,5,7,8, and 9 , selected of them at random and from a four-digit...
From the digits 0,1,2,3,5,7,8, and 9 , selected of them at random
and from a four-digit number, none of these digits appears more
than once in each number.
(a) Find the probability that the number formed is even.
(b) Find the probability that the number formed is divisible
by 3.
30 students were randomly selected from a large group of students taking a certain test. The...
30 students were randomly selected from a large group of
students taking a certain test. The mean score for the students in
the sample was 86.
Assume that σ = 11.1. Construct a 99% confidence interval for the
mean score, μ, of all students
9. The table below gives the number of hours five randomly selected students spent studying and...
9. The table below gives the number of hours five randomly
selected students spent studying and their corresponding midterm
exam grades. Using this data, consider the equation of the
regression line, yˆ=b0+b1x, for predicting the midterm exam grade
that a student will earn based on the number of hours spent
studying. Keep in mind, the correlation coefficient may or may not
be statistically significant for the data given. Remember, in
practice, it would not be appropriate to use the regression...
Suppose that a committee of 12 people is selected in a random manner from a group...
Suppose that a committee of 12 people is selected in a random
manner from a group of 100 people. Determine the probability that
two particular people A and B will both be selected.
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