The assignment is attached below
INTRODUCTION TO Z SCORES!!!!!!
IF YOU KNOW THE "MEAN" (that we worked on in Chapter 3) and THE STANDARD DEVIATION (that we are working on in Chapter 4) then you can GET A Z-SCORE
FOOTBALL ASSIGNMENT #3 IS JUST PRACTICE FINDING THOSE Z-SCORES
OUR TEXTBOOK ASSIGNMENTS, WILL SHOW US WHAT TO DO WITH THOSE Z-SCORES
HERE'S A SAD FACT.......Z-SCORES ARE NOT GOING AWAY, EVEN IF YOU IGNORE THEM HERE, THEY COME BACK IN CHAPTER 10......THEN IN CHAPTER 13 THEY TURN INTO T-SCORES......SO MIGHT AS WELL TRY TO UNDERSTAND THEM NOW.
Chapter 5: NORMAL DISTRIBUTIONS and STANDARD (z) SCORES
VERY DIFFICULT CHAPTER THIS WEEK, SOMETHING BRAND NEW, YOU'VE PROBABLY NEVER HEARD OF...........Z-SCORES SO I BEG OF YOU, PLEASE READ ALONG WITH THE CHAPTER
AND WHEN YOU GET TO A PROGRESS CHECK, CHECK OUT MY WORK AND EXAMPLE IN THE DISCUSSION AREA, MAKE SURE YOU UNDERSTAND
IF YOU DO, MOVE ON TO THE NEXT ONE
IF YOU DON'T, PLEASE E-MAIL YOUR PEER LEADER OR ME IMMEDIATELY......THIS IS MY FAVORITE CHAPTER, I'LL TRY TO EXPLAIN IT UNTIL I'M BLUE IN THE FACE!!!!!
SCREAM (E-MAIL) IF YOU HAVE ANY QUESTIONS!!!!
My Assigned question is
- Question 5.14 (d) and Question 5.18 (a)
Question 5.14
5.14: For the normal distribution of burning times of electric light bulbs, with a mean equal to 1200 hours and a standard deviation equal to 120 hours, what burning time is identified with the
(a) upper 50 percent?
(d) middle 90 percent?
Top of Form
5.18: (a) The body mass index (BMI) measures body size in people by dividing weight (in pounds) by the square of height (in inches) and then multiplying by a factor of 703. A BMI less than 18.5 is defined at underweight; between 18.5 to 24.9 is normal; between 25 and 29.9 is overweight; and 30 or more is obese. It is well established that Americans have become heavier during the last half century. Assume that the positively skewed distribution of BMIs for adult American males has a mean of 28 with a standard deviation of 4
(a) Would the median BMI score exceed, equal, or be exceeded by the mean BMI score of 28
Bottom of Form
When it comes to choosing the B column or C column....................you can
1) JUST KNOW IT
2) BE ABLE TO FOLLOW THE DIAGRAMS AT THE TOP AND BOTTOM OF PAGES 458 and 459 (the z-table)
or use these tricks
B Column,......WHEN AN AREA IS BELOW A NUMBER ABOVE THE MEAN = Different's (Below and above) or BETWEEN's (Between the Number and the Mean)
B' Column..... WHEN AN AREA IS ABOVE A NUMBER BELOW THE MEAN = Different's (Above and Below) or BETWEEN's (Between the Number and the Mean
B = (B)ETWEEN'S
C Column........WHEN AN AREA IS ABOVE A NUMBER ABOVE THE MEAN = SAME's (Above and Above) or AWAY'S (AWAY FROM THE MEAN)
C' Column.......WHEN AN AREA IS BELOW A NUMBER BELOW THE MEAN = SAME'S (Below and Below) or AWAY"s (AWAY FROM TEH MEAN)
C = The other one....(A)WAYS
NOW, YOU KNOW HOW WE'VE BEEN SQUARING NUMBERS
POSITVE x POSITIVE = POSITIVE (C column..........same's...........ABOVE and ABOVE)
NEGATIVE x NEGATIVE = POSITIVE (C column........same's.......BELOW AND BELOW)
POSITIVE X NEGATIVE = NEGATIVE (B column......Differing’s.........ABOVE AND BELOW)
NEGATIVE x POSITIVE = NEGATIVE (B Column.....Different’s...........BELOW and ABOVE)
NOW WHEN IT COMES TO AREAS BETWEEN 2 NUMBERS OR Z-SCORES...........
REMEMBER, WHEN WE HAVE THEM ON THE SAME SIDE OF THE MEAN, WE GET THE PROPORTION AND THEN WE SUBTRACT THE SMALLER NUMBER FROM THE LARGER NUMBER (USING THE SAME COLUMN, DOESN'T MATTER IF IT'S B and C) BECAUSE...................WE CAN'T HAVE A NEGATIVE PROPORTION
WHEN IT STRADDLES THE MEAN.....WE ADD OUR 2 B PROPORTIONS.............because by Straddling (meaning on both sides of the Mean) WE WILL HAVE ONE AREA ABOVE A NUMBER BELOW THE MEAN and another AREA BELOW A NUMBER ABOVE THE MEAN (2 Different or Between)
FOOTBALL ASSIGNMENT #3 (October 1-10)
USING THE DISTRIBUTION OF YOUR TEAM'S 2020 SCORES AND THE MEAN YOU GOT IN FOOTBALL ASSIGNMENT #1 and THE STANDARD DEVIATION YOU GOT IN FOOTBALL ASSIGNMENT #2
AND THE FORMULA FROM PAGE 86 where Z = x-u/o
X = YOUR SCORE
U = THE MEAN
0 = STANDARD DEVIATION.
GIVE ME THE Z-SCORE FOR THAT GAME, THE PROPORTION OF THE B COLUMN and THE PROPORTION FOR THE C Column
As Usual, SEE MY EXAMPLE INSIDE!
HELLO EVERYBODY...................Just Follow my Lead/Example.........Substitute YOUR numbers for MY numbers.
Nothing Fancy Here, Just practicing getting z-scores using the GAME SCORE (X), The MEAN (Football Assignment #1) and The STANDARD DEVIATION (Football Assignment #2)
Roughly 10 or 11 Games should have Z-scores Below 1.00 and Above -1.00
Only 1, maybe 2 Games should have Z-scores Below -1.96 or Above +1.96
No Z-scores should be higher than + 2.58..........maybe 1 on a rare occasion.
you have been assigned the SAN FRANCISCO 49ers (NFC West) for your Football Assignments.
This is the Information you will need.
Game 1: They scored 20 points, the game was at Home
Game 2: Scored 31 points, game was Away
Game 3: 36 points, Away
Game 4: 20 points, Home
Game 5: 17 points, Home
Game 6: 24 points, Home
Game 7: 33 points, Away
Game 8: 27 points, Away
Game 9: 17 points, Home
Game 10: 13 points, Away
Game 11: 23 points, Away
Game 12: 24 points, Home
Game 13: 15 points, Away
Game 14: 33 points, Home
Game 15: 20 points, Away
Game 16: 23 points, Home
