1. WarmUp A-F: put at top of today’s assignment on p.923-925
A. The mean of a set of normally distributed data is 128 and the standard deviation is 4. Sketch a graph of the situation.

2. Warm-up: continued… B. What percent of the data is in the
interval ? Just write your answer!
C. What percent of the data is in the
interval ? Write the calculator
command and your answer.

3. Reminder from yesterday:
Calculator commands
we will use:
2nd DISTR
2:normalcdf(lower, upper,  ,)
3:invNorm(probability,  , )
Given the boundary lines, find the area (percent shaded.)
Given the area (percent shaded), find the boundary line.
Note: Calculator always shades from left to right…from 0% to the unknown boundary line.

4. Warm-up: continued… D. Find the interval about the mean that
contains 70% of the data. Sketch a
general curve, label the percentages, then
write the calculator command and answer.

5. Warm-up: continued… E. Find the limit (boundary) above which
70% of the data lies. Sketch a general
curve, label the percentages, then write the
calculator command and answer.

6. Warm-up: continued… F. Find the limit that has 70% of the data
below the boundary. Sketch a general
curve, label the percentages, then write the
calculator command and answer.

7. Reminder from yesterday:
Area under the Standard Normal Curve:
The area represents the probability (percent
of data) for a given interval of the normal distribution.
Calculator commands
we will use today:
2nd DISTR
2:normalcdf(lower, upper,  ,)
3:invNorm(probability,  , )
The calculator always
measures to the left
of the z-value.