Download 2.2 Calculator work

AP Statistics
Ms. Gunther
Chapter 2
Section 2.2: Using your Calculator for Normal Distributions
 Use the ShadeNorm feature on your graphing calculator
 Use the Normalcdf feature on your graphing calculator
 Use the invNorm feature on your graphing calculator
***Complete the following using your calculator. Answer all
questions and all parts on edmodo.***
ShadeNorm feature: (technology toolbox page 115 in textbook)
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Provides a picture of a normal distribution and corresponding shaded
region
Displays the proportion of observations: “specified area under the curve”
Need to set window so the picture will display appropriately
Use with nonstandardized information from a given problem
Must specify an interval (which will change depending on the problem)
o ShadeNorm(observation, upperbound, mean, standard deviation)
o ShadeNorm(lower bound, observation, mean, standard deviation)
To determine the upper/lower bound, the number you select should be
very far into the tail of the distribution (over 5 standard deviations)
Use the ShadeNorm() feature to answer the following.
Use the ShadeNorm() feature to answer the following.
normalcdf() feature: (technology toolbox page 116 in textbook)
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Provides the proportion of observations: “specified area under the curve”
DOES NOT display a picture of the normal distribution and the problems
corresponding shaded region
Use with nonstandardized information from a given problem
Must specify an interval (which will change depending on the problem)
o normalcdf(observation, upperbound, mean, standard deviation)
o normalcdf(lower bound, observation, mean, standard deviation)
To determine the upper/lower bound, the number you select should be
very far into the tail of the distribution (over 5 standard deviations)
Use the calculator’s “normalcdf” function to verify your answers to
the following.
invNorm() feature: (technology toolbox page 117 in textbook)
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Calculates the raw data value
OR it can calculate the standardized normal value (z-score)
o invNorm(proportion of observations, mean, standard deviation)
o invNorm (proportion of observations)
To determine the upper/lower bound, the number you select should be
very far into the tail of the distribution (over 5 standard deviations)
Use the calculator’s “invNorm” function to verify your answers to the
following.