Counting Stuff
Another way to write
6*5*4*3*2*1
6!
Which of the following does not measure the center:
a) Mean
b) Standard Deviation
c) Median
Standard Deviation
A z score measures how many ________ _________ you are from the ________
standard devaitions
If the average length of a song in a database is 3.89 minutes with a standard deviation of 0.4 minutes, what percent of the songs are between 3.49 minutes and 4.29 minutes?
68%
1969_____ Trail
Braves
20 people in a race. How many ways are there to award gold, silver, and bronze?
6840
Which data set has the highest standard deviation
a) 4, 3, 4, 5, 4, 4, 3, 5, 3, 4, 5, 4, 4, 5, 4, 3, 3, 5
b) 5, 3, 5, 3, 5, 3, 5, 3, 5, 3, 5, 3, 5, 3, 5, 3, 5, 3
c) 2, 10, 8, 10, 1, 3, 12, 3, 4, 11, 2, 5, 12, 18
C
If the mean SOL score is 424 and the standard deviation is 12, find the z score corresponding to a score of 460 to the nearest tenth.
3.0
Suppose the mean length of a baseball game is 2.42 hours with a standard deviation of 0.35 hours, 97.5% of the games are below what amount of time?
3.12 hours
The Chesapeake public high school closest to the North Carolina border.
Hickory
Math department has 13 teachers. How many ways can 4 be chosen to go to a conference?
715
Which value is most affected by extreme vales or outliers?
a) Mean b) Median c) Mode
a) Mean
The average weight of a chicken egg is 62 grams with a standard deviation of 8.2 grams. The z score of an egg is -1.9. Find the weight of the egg to the nearest tenth.
46.4 grams
Find P(z>1.35)
0.0885 or 8.85%
IRHS Assistant Principal of Instruction
Mrs. Lancaster
How many ways can you arrange the letters in the work Tennessee?
3780
Jackson says that the median of
2, 7, 3, 11, 4, 8, 15 is 11. Whys is he wrong?
Didn't write the numbers in order.
Kelly's mean steps per day day is 4350. On Friday, she has 5400 steps and this was 1.7 standard deviations above the mean. Find the standard deviation to the nearest tenth.
617.6
Suppose 2000 students took the SAT. The mean was found to be 986 with a standard deviation of 75. Approximately how many students scored above an 1100.
About 129
Mrs. Dunbar used to teach what subject?
Math
What is another way to write
54*53*52*...*37*36
(54!)/(35!)
The mean of 5, 10, 12, 15, and x is 11. Find the median.
12
Using your table, find the closest z score with the following area: 0.10
-1.28
The mean length of a bolt is 8.50 cm with a standard deviation of 0.10 cm. What percent of the bolts are between 8.45 and 8.55 cm?
38.3%
A large factory near IRHS used to produce what motor vehicle?
Ford F150.