Question

Suppose a normally distributed set of data with 8000 observations has a mean of 167 and a standard deviation of 11. Use the 68-95-99.7 Rule to determine the number of observations in the data set expected to be above a value of 145. Round your answer to the nearest whole value.

Answer #1

Suppose a normally distributed set of data with 2100
observations has a mean of 130 and a standard deviation of 19. Use
the 68-95-99.7 Rule to determine the number of observations in the
data set expected to be above a value of 111. Round your answer to
the nearest whole value.

1.Suppose a normally distributed set of data with 6200
observations has a mean of 116 and a standard deviation of 19. Use
the 68-95-99.7 Rule to determine the number of observations in the
data set expected to be above a value of 135. Round your answer to
the nearest whole value.
2.A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 9.5 years, and standard
deviation of 1.6 years.
The 9% of items with the...

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.)

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.)

A data set has a mean of 135, a median of 137, and a standard
deviation of 13. Marrion concludes that 99.7% of the data in the
set must have values between 96 and 174.
What flaw, if any, is there in Marrion’s reasoning? Pick only
one.
A. Marrion should have calculated three standard deviations from
the median instead of calculating three standard deviations from
the mean.
B. There is no flaw in Marrion’s reasoning. He calculated three
standard deviations...

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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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 the mean of 110 and a standard deviation of 15.
use the 86-95-99.7 rule

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