A particular IQ test is standardized to a Normal model, with a mean of 100100 and...
A particular IQ test is standardized to a Normal model, with a mean of
100100
and a standard deviation of
2020.
a) Choose the model for these IQ scores that correctly shows what the 68-95-99.7 rule predicts about the scores.
A.
font size decreased by 3 120120
font size decreased by 2 mu plus sigmaμ+σ
font size decreased by 2 mu plus 2 sigmaμ+2σ
font size decreased by 2 mu plus 3 sigmaμ+3σ
font size decreased by 2 mu minus sigmaμ−σ
font size decreased by 2 mu minus 2 sigmaμ−2σ
font size decreased by 2 mu minus 3 sigmaμ−3σ
font size decreased by 2 muμ
font size decreased by 3 140140
font size decreased by 3 100100
font size decreased by 3 160160
font size decreased by 3 8080
font size decreased by 3 6060
font size decreased by 3 180180
68%95%99.7%
A bell-shaped curve with horizontal axis from less than 60 to 180 plus in intervals of 20 begins close to the horizontal axis, increases at an increasing and then decreasing rate to its maximum at 120, labeled "mu," and decreases at an increasing and then decreasing rate approaching the horizontal axis. The curve is symmetric. The area below the curve is subdivided into regions by the intervals as follows: the region from mu minus sigma, 100, to mu plus sigma, 140, is labeled "68%"; the region from mu minus 2 times sigma, 80, to mu plus 2 times sigma, 160, is labeled "95%"; the region from mu minus 3 times sigma, 60, to mu plus 3 times sigma, 180, is labeled "99.7%."
B.
font size decreased by 3 100100
font size decreased by 2 mu plus sigmaμ+σ
font size decreased by 2 mu plus 2 sigmaμ+2σ
font size decreased by 2 mu plus 3 sigmaμ+3σ
font size decreased by 2 mu minus sigmaμ−σ
font size decreased by 2 mu minus 2 sigmaμ−2σ
font size decreased by 2 mu minus 3 sigmaμ−3σ
font size decreased by 2 muμ
font size decreased by 3 120120
font size decreased by 3 8080
font size decreased by 3 140140
font size decreased by 3 6060
font size decreased by 3 4040
font size decreased by 3 160160
68%95%99.7%
A bell-shaped curve with horizontal axis from less than 40 to 160 plus in intervals of 20 begins close to the horizontal axis, increases at an increasing and then decreasing rate to its maximum at 100, labeled "mu," and decreases at an increasing and then decreasing rate approaching the horizontal axis. The curve is symmetric. The area below the curve is subdivided into regions by the intervals as follows: the region from mu minus sigma, 80, to mu plus sigma, 120, is labeled "99.7%"; the region from mu minus 2 times sigma, 60, to mu plus 2 times sigma, 140, is labeled "95%"; the region from mu minus 3 times sigma, 40, to mu plus 3 times sigma, 160, is labeled "68%."
C.
font size decreased by 3 100100
font size decreased by 2 mu plus sigmaμ+σ
font size decreased by 2 mu plus 2 sigmaμ+2σ
font size decreased by 2 mu plus 3 sigmaμ+3σ
font size decreased by 2 mu minus sigmaμ−σ
font size decreased by 2 mu minus 2 sigmaμ−2σ
font size decreased by 2 mu minus 3 sigmaμ−3σ
font size decreased by 2 muμ
font size decreased by 3 120120
font size decreased by 3 8080
font size decreased by 3 140140
font size decreased by 3 6060
font size decreased by 3 4040
font size decreased by 3 160160
68%95%99.7%
A bell-shaped curve with horizontal axis from less than 40 to 160 plus in intervals of 20 begins close to the horizontal axis, increases at an increasing and then decreasing rate to its maximum at 100, labeled "mu," and decreases at an increasing and then decreasing rate approaching the horizontal axis. The curve is symmetric. The area below the curve is subdivided into regions by the intervals as follows: the region from mu minus sigma, 80, to mu plus sigma, 120, is labeled "68%"; the region from mu minus 2 times sigma, 60, to mu plus 2 times sigma, 140, is labeled "95%"; the region from mu minus 3 times sigma, 40, to mu plus 3 times sigma, 160, is labeled "99.7%."b) In what interval would you expect the central
6868%
of the IQ scores to be found?Using the 68-95-99.7 rule, the central
6868%
of the IQ scores are between
nothing
and
nothing.
(Type integers or decimals. Do not round.)
c) About what percent of people should have IQ scores above
160160?
Using the 68-95-99.7 rule, about
nothing%
of people should have IQ scores above
160160.
(Type an integer or a decimal. Do not round.)
d) About what percent of people should have IQ scores between
4040
and
6060?
Using the 68-95-99.7 rule, about
nothing%
of people should have IQ scores between
4040
and
6060.
(Type an integer or a decimal. Do not round.)
e) About what percent of people should have IQ scores above
140140?
Using the 68-95-99.7 rule, about
nothing%
of people should have IQ scores above
140140.
(Type an integer or a decimal. Do not round.)
Click to select your answer(s).
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