WarmUp A-F: put at top of today’s assignment on p

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Presentation transcript:

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.

Warm-up: continued… B. What percent of the data is in the interval 120-136? Just write your answer! C. What percent of the data is in the interval 125-131? Write the calculator command and your answer.

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.

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.

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.

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.

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.