Question

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities. a. The percentage of scores less than 100 is . (Round to one decimal place as needed.) b. The percentage of scores greater than 120 . (Round to one decimal place as needed.) c. The percentage of scores between 60 and 120 is nothing%. (Round to one decimal place as needed.)

Answer #1

Use the 68-95-99.7 rule

Assume that a set of test scores is normally distributed with a
mean of 100 and a standard deviation of 10 . Use the 68-95-99.7
rule to find the following quantities. a. The percentage of scores
less than 110 is %. (Round to one decimal place as needed.) b.
The percentage of scores greater than 110 is nothing %. (Round to
one decimal place as needed.)

Assume that a set of test scores is normally distributed with a
mean of 100 and a standard deviation of 10. Use the 68-95-99.7
rule to find the following quantities.
a. The percentage of scores less than 100 is __%
b. The percentage of scores greater than 110 is __%
c. The percentage of scores between 80 and 110 is __%
(Round to one decimal place as needed)

Assume that a set of test scores is normally distributed with a
mean of 80 and a standard deviation of 20. Use the 68-95-99.7 rule
to find the following quantities.
The percentage of scores less than 80 is __%
The percentage of scores greater than 100 is _%
The percentage of scores between 40 and 100 is _%
Round to the nearest one decimal

Assume that a set of test scores is normally distributed with a
mean of 80 and a standard deviation of 25. Use the 68-95-99.7 rule
to find the following quantities.
c. The percentage of scores between 30 and 105 is %.?
(Round to one decimal place as needed.)

assume that a set of test scores is normally
distributed with the mean of 110 and a standard deviation of 15.
use the 86-95-99.7 rule

A set of exam scores is normally distributed with a mean = 80
and standard deviation = 10.
Use the Empirical Rule to complete the following
sentences.
68% of the scores are between _____ and ______.
95% of the scores are between ______ and _______.
99.7% of the scores are between _______ and ________.
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Suppose a normally distributed set of data has a mean of 193 and
a standard deviation of 13. Use the 68-95-99.7 Rule to determine
the percent of scores in the data set expected to be below a score
of 219. Give your answer as a percent and includeas many decimal
places as the 68-95-99.7 rule dictates. (For example, enter 99.7
instead of 0.997.)

Based on data from a college, scores on a certain test are
normally distributed with a mean of 1511 and a standard deviation
of 329. Complete parts (a) through (c) below.
a. Find the percentage of scores greater than 1708. ___% (Round
to two decimal places as needed.)
b. Find the percentage of scores less than 1379. ___% (Round
to two decimal places as needed.)
c. Find the percentage of scores between 1248 and 2005. ___%
(Round to two decimal...

A certain standardized test's math scores have a bell-shaped
distribution with a mean of 515 and a standard deviation of 105.
Complete parts (a) through (c). (a) What percentage of
standardized test scores is between 410 and 620? (Round to one
decimal place as needed.(b) What percentage of standardized test
scores is less than 410 or greater than 620? nothing% (Round to
one decimal place as needed.) (c) What percentage of standardized
test scores is greater than 725? nothing% (Round...

Intelligence quotients (IQs) are normally distributed with a
mean of 100 and standard deviation of 15. Use the 68-95-99.7 Rule
to determine the percentage of people with IQ below 70.
Group of answer choices
a. 95%
b. 2.5%
c. 68%
d. 5%

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