Question
In: Statistics and Probability
At a local high school 80% of students who enter as freshmen go on to graduate....
At a local high school 80% of students who enter as freshmen go on to graduate. 20 freshmen are randomly selected.
a.
What is the probability that at most 12 students will go on to graduate? Round your answer to 4 decimal places.
b.
What is the probability that at at least 15 students will go on to graduate? Round your answer to 4 decimal places.
c.
What is the probability that at least 12 and no more than 16 students will go on to graduate? Round your answer to 4 decimal places.
Solutions
orchestra answered 1 year agoRelated Solutions
At the local high school, there are 297 students. 71 students are seniors, and out of...
At the local high school, there are 297 students. 71 students
are seniors, and out of the 71 students, 53 participate in a sport
(while 18 do not participate in a sport). Among those who are not
seniors, 69 students participate in a sport and 157 do not. Suppose
we choose one student at random from the entire class.
A. Are events "drawing someone who is a senior" and "drawing
someone who does not play a sport" mutually exclusive? Why/why...
In a certain high school, uniforms are optional. A study shows that high school students who...
In a certain high school, uniforms are optional. A study shows
that high school students who wear uniforms have a lower grade
average than students who don't wear uniforms. From this study, the
school administration claims that they should not require the
students to wear uniforms because that is the cause of the lowering
grades. Another possible explanation is that students who wear
uniforms are poorer than the students who don't wear uniforms and
the economic situation of their parents...
The combined SAT scores for the students at a local high school are normally distributed with...
The combined SAT scores for the students at a local high school
are normally distributed with a mean of 1521 and a standard
deviation of 298. The local college includes a minimum score of
1044 in its admission requirements. What percentage of students
from this school earn scores that fail to satisfy the admission
requirement?
The combined SAT scores for the students at a local high school are normally distributed with...
The combined SAT scores for the students at a local high school
are normally distributed with a mean of 1488 and a standard
deviation of 292. The local college includes a minimum score of
2014 in its admission requirements. What percentage of students
from this school earn scores that fail to satisfy the admission
requirement? P(X < 2014) =________ % Enter your answer as a
percent accurate to 1 decimal place (do not enter the "%" sign).
Answers obtained using...
Suppose that a principal of a local high school tracks the number of minutes his students...
Suppose that a principal of a local high school tracks the
number of minutes his students spend texting on a given school day.
He finds that the distribution of minutes spent texting is roughly
normal with a mean of 60 and a standard deviation of 20. Use this
information to answer the following questions.
1. Based on the statistics, what is the probability of selecting
at random a student who spends an extreme amount of time texting –
either less...
Suppose that a principal of a local high school tracks the number of minutes his students...
Suppose that a principal of a local high school tracks the
number of minutes his students spend texting on a given school day.
He finds that the distribution of minutes spent texting is roughly
normal with a mean of 60 and a standard deviation of 20. Use this
information to answer the following questions.
1. Based on the statistics, find the two numbers of minutes that
define the middle 95% of students in the distribution. What is the
value for...
A local statistician is interested in the proportion of high school students that drink coffee. Suppose...
A local statistician is interested in the proportion of high
school students that drink coffee. Suppose that 20% of all high
school students drink coffee. A sample of 75 high school students
are asked if they drink coffee.
What is the probability that out of these 75 people, 14 or more
drink coffee?
An Illinois state program evaluator is tasked with studying the intelligence of soon-to-graduate high school students...
An Illinois state program evaluator is tasked with studying the
intelligence of soon-to-graduate high school students in a number
of Chicago-area high schools.
One of the specific questions that needs to be answered is, “How
do the students of Collins High School, one of Chicago’s
lowest-rated high schools in terms of academic achievement, fare in
intelligence compared to students of Lincoln Park High School, one
of Chicago’s highest-rated high schools in terms of academic
achievement?”.
To conduct this study, the...
A nationwide award for high school students is given to outstanding students who are sophomores, juniors,...
A nationwide award for high school students is given to
outstanding students who are sophomores, juniors, or seniors
(freshmen are not eligible). Of the award-winners, 65 percent are
SENIORS, 20 percent JUNIORS, and 15 percent are SOPHOMORES.
Note: Your answers should be expressed as decimals rounded to
three decimal places.
(a) Suppose we select award-winners one at a time and continue
selecting until a SENIOR is selected. What is the probability that
we will select exactly three award-winners?
(b) Suppose...
A nationwide award for high school students is given to outstanding students who are sophomores, juniors,...
A nationwide award for
high school students is given to outstanding students who are
sophomores, juniors, or seniors (freshmen are not eligible). Of the
award-winners, 60 percent are SENIORS, 24 percent JUNIORS, and 16
percent are SOPHOMORES.
Note: Your answers should be expressed as decimals rounded to
three decimal places.
(a) Suppose we select award-winners one at a time and continue
selecting until a SENIOR is selected. What is the probability that
we will select exactly three award-winners?
(b) Suppose...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Use the bond term's below to answer the question Maturity 7 years Coupon Rate 4% Face...
- What experience have you had with Organization Development or with Change Management? Describe the organization, the...
- 1. Renfro Rentals has issued bonds that have a 12% coupon rate, payable semiannually. The bonds...
- Given an array of positive integers a, your task is to calculate the sum of every...
- Define “culture.” Software is defined by the Merriam-Webster Dictionary as "the programs that run on a...
- In humans, hypotrichosis (sparse body hair) is a rare autosomal recessive condition. Let h = hypotrichosis...
- Increase all of the listing prices by 5% for all listings under $500,000 and 10% for...
ADVERTISEMENT