Statistics
This represents how many numbers there are in a data set.
What is n?
2, 3, 5, 6, 7, 7, 9, 11
find n
What is 8?
Tommy is one std. dev. below the mean.
What is -1, negative one?
Using Tommy’s z-score of -1
What is he beat 16% and 84% beat him?
Step one to solving for standard deviation
What is (x-m)?
The value that appears the most often.
What is the mode?
2, 3, 5, 6, 7, 7, 9, 11
find the mode
What is 7?
Sara is two std. dev. above the mean.
What is +2, positive two?
Using Sara’s z-score of +2
What is she beat 98% and 2% beat her?
Step two to solving for standard deviation
What is (x-m)2?
The difference between the largest and smallest value.
What is the range?
2, 3, 5, 6, 7, 7, 9, 11
find the range
What is 9 or 2 through 11?
Mikey is two std. dev. below the mean.
What is -2, negative two?
Using Mikey’s z-score of -2
What is he beat 2% and 98% beat him?
Step three to solving for standard deviation
What is finding the sum of squares?
The middle value, the midpoint of the data when arranged in order.
What is the median?
2, 3, 5, 6, 7, 7, 9, 11
find the median
What is 6.5?
Amy is one std. dev. above the mean.
What is +1, positive 1?
Using Sara’s z-score of +1
What is she beat 84% and 16% beat her?
Step four to solving for standard deviation
What is dividing the sum of squares by n and getting the VARIANCE?
All data points added up and divided by the total amount of numbers.
What is the mean?
2, 3, 5, 6, 7, 7, 9, 11
find the mean
What is 6.25?
Ronnie is at the mean score.
What is 0?
Using Ronnie’s z-score of 0
What is he beat 50% and 50% beat him?
Step five to solving for standard deviation
What is square rooting the variance?