Normal Distribution: If data is NORMALLY DISTRIBUTED, then it should be distributed as
follows. This means, 34% of the data scores are located from the mean to plus one deviation.
13.5% of the scores will be located from -1 to -2 deviations from the mean.
a) Draw the curve and put in the mean. Add in plus/minus 1, 2, 3 deviations.
b) Now how many of 174 students received scores from in the range of 61.2 to 75.8?
c) How many kids received scores from 1 to 2 deviations BELOW the mean?
1. Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10.
a) In a group of 230 tests, how many students score above 96?
b) In a group of 230 tests, how many students score below a 66?
c) In a group of 230 tests, how many students soccer within on standard deviation of the mean?
2. The number of nails of a given length is normally distributed with a mean length of 5.00
inches and a standard deviation of 0.03 inches.
a) Find the number of nails in a bag of 120 that are less than 4.94 inches long.
b) Find the number of nails in a bag of 120 that are between 4.97 and 5.03 inches long.
c) Find the number of nails in a bag of 120 that are over 5.03 inches long.
PG. 689 #15-17, #24 check answers.
PG. 696 #27
Things to think about for notecard.
-Binomial Thereom/Pascal’s triangle through 4 rows.
-Binomial Experiments. nCr(success)n(failures)n-r
-Definition of mutually exclusive.
-Conditional Probability formula. P(B|A) = ?
-Mean/Median/Mode
-Box and Whisker
-Standard deviation
-Margin of Error
-Normal Distribution.
TEST FRIDAY!!!