Question

The distribution of math test scores on a standardized test administered to Texas tenth-graders is approximately Normal with a mean of 615 and a standard deviation of 46. Below what score do the worst 2.5% of the scores fall? (Hint: apply the 68-95-99.7 Rule.) Round your answer to the nearest integer.

Answer #1

The distribution of scores on a standardized aptitude test is
approximately normal with a mean of 500 and a standard deviation of
95 What is the minimum score needed to be in the top 20%
on this test? Carry your intermediate computations to at least
four decimal places, and round your answer to the nearest
integer.

Suppose the scores on an IQ test approximately follow a normal
distribution with mean 100 and standard deviation 12. Use the
68-95-99.7 Rule to determine approximately what percentage of the
population will score between 100 and 124.

The scores on one portion of a standardized test are
approximately Normally distributed, N(572, 51).
a. Use the 68-95-99.7 rule to estimate the range of scores that
includes the middle 95% of these test scores.
b. Use technology to estimate the range of scores that includes
the middle 90% of these test scores.

distribution of scores for a certain standardized test is a
normal distribution with a mean of 4 75 and the standard deviation
of 30
between what two values would you expect to find about 68%
between what two values would you expect to find about
99.7%

Eleanor scores 680 on the math portion of the SAT. The
distribution of math SAT scores is approximately Normal, with mean
500 and standard deviation 100. Jacob takes the ACT math test and
scores 27. ACT math test scores are Normally distributed with mean
18 and standard deviation 6.
a. Find the standardized scores (z-scores) for both students.
b. Assuming that both tests measure the same kind of ability, who
has the higher score?
c. What score must a student...

Eleanor scores 680 on the mathematics part of the SAT. The
distribution of SAT math scores in recent years has been Normal
with mean 535 and standard deviation 97.
Gerald takes the ACT Assessment mathematics test and scores 27.
ACT math scores are Normally distributed with mean 22.8 and
standard deviation 2.1.
What is Elanor's standardized score?
Round to 2 decimal places.
What is Gerald's standardized score?
Round to 2 decimal places.
Assuming that both tests measure the same kind...

Apply the 68-95-99.7 Rule to a normal distribution of SAT scores
with a mean of 1030 and a standard deviation of 180. Please show
calculations so that I can understand how to answer such
questions.

test scores in a MATH 1030 class is approximately normally
distributed with mean 86 and standard deviation 6. Round answers to
the nearest tenth of a percent. a) What percentage of scores will
be less than 88? % b) What percentage of scores will be more than
82? % c) What percentage of scores will be between 81 and 87? %

For students in a certain region, scores of students on a
standardized test approximately follow a normal distribution with
mean ?=531.5μ=531.5 and standard deviation ?=28.1σ=28.1. In
completing the parts below, you should use the normal curve area
table that is included in your formula packet.
(a) What is the probability that a single randomly selected
student from among all those in region who took the exam will have
a score of 536 or higher?
ANSWER:
For parts (b) through (e),...

26. The scores on a standardized math test for 8th grade
children form a normal distribution with a mean of 80 and a
standard deviation of 10. (8 points) a. What proportion of the
students have scores less than X = 83? b. If samples of n = 6 are
selected from the population, what proportion of the samples have
means less than M = 83? c. If samples of n = 30 are selected from
the population, what proportion...

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