Question

Suppose that, for a randomly selected high school student who has taken a college entrance exam, the probability of scoring above 650 is 0.3. A random sample of n = 9 such students was selected. What is the probability that none of the students scored over 650?

Answer #1

A
college entrance exam company determined that a score of 2424 on
the mathematics portion of the exam suggests that a student is
ready for college-level mathematics. To achieve this goal, the
company recommends that students take a core curriculum of math
courses in high school. Suppose a random sample of 150150 students
who completed this core set of courses results in a mean math score
of 24.624.6 on the college entrance exam with a standard deviation
of 3.43.4. Do...

Suppose that the first scores for a particular college entrance
exam are distributed according to a bell-shaped, symmetric
distribution with a mean of 450 and variance of 10,000.
a) what percent of the students who take the exam score between
350 and 650?
b) any student who scores higher 550 is automatically admitted
to the colleges. what percent of the students who take the exam are
automatically admitted to the college?
c) what percent of the students who take the...

A study considers whether the mean score of a college entrance
exam for students in 2019 (Group 1) was higher than the mean score
in 2018 (Group 2). A random sample of 25 students who took the exam
in 2019 and a random sample of 25 students who took the exam in
2018 were selected. Assume α=0.1. If the p-value is 0.34, which is
the following is an accurate interpretation?
(a) At α=10%, there is sufficient evidence to indicate that...

Suppose that 4% of the 2 million high school students who take
the SAT each year receive special accommodations because of
documented disabilities. Consider a random sample of 15 students
who have recently taken the test. (Round your probabilities to
three decimal places.)
Suppose that a student who does not receive a special accommodation
is allowed 3 hours for the exam, whereas an accommodated student is
allowed 4.5 hours. What would you expect the average time allowed
the 15 selected...

The time taken by a randomly selected student to fill out an
online SOTE has a normal distribution with mean 2 minutes and
standard deviation 45 seconds. Suppose 4 students fill out an
online SOTE on a randomly selected day. Find the probability that
the sample average amount of time taken is at most 3 minutes.

A college entrance test company determined that a score of 25 on
the mathematics portion of the test suggests that a student is
ready for college-level mathematics. To achieve this goal, the
company recommends that students take a core curriculum of math
courses in high school. Suppose a random sample of 200 students who
completed this core set of courses results in a mean math score of
25.7 on the college entrance test with a standard deviation of 3.3.
Do...

Let
X be the score on a national test of randomly selected student from
West High School and Y be the score on the same test of a randomly
selected student from East High School. Suppose X has a normal
distribution with mean 50 and variance 29. Y has a normal
distribution with mean 47 and variance 35, and X and Y are
independent. If a student from each high school is randomly
selected, what is the probability that the...

At Abraham Lincoln High School an achievement test is used for
college placement. Counselors selected a simple random sample of 30
students from the school and scored their tests by hand before
sending them in for computer processing. For this sample, top
enclose x equals 525 comma space s equals 25 . Construct a 99%
confidence interval for mu, the population mean score for Abraham
Lincoln High School. Round your answer to one decimal place.

20% of US High School teens vape. A local High School has
implemented campaigns to reduce vaping among students and believes
that the percentage of students who vape at this High School is
lower than the national average. School administration
implements a survey of 300 randomly selected students. They find
that 51 of the 300 vape.
If the true proportion of students who vape at this school is
20%, what is the approximate probability of observing 51 or fewer
vapers...

A survey of 800 randomly selected high school students
determined that 743 play organized sports.
(a) What is the probability that a randomly selected high
school student plays organized sports?(Round to the nearest
thousandth as needed.)
(b) Interpret this probability.
(b) Choose the correct answer below.
(Type a whole number.)
A.If 1,000 high school students were sampled, it would be
expected that exactly______of them play organized sports.
B.If 1,000 high school students were sampled, it would be
expected that about______of...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 50 seconds ago

asked 5 minutes ago

asked 14 minutes ago

asked 14 minutes ago

asked 20 minutes ago

asked 23 minutes ago

asked 32 minutes ago

asked 44 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago