Counting Strategies
60
What is mean?
what is the average of a group.
What shape does a normal distribution graph have?
A bell shaped curve.
What is z score?
what is the exact standard deviation above or below the dataset.
This square root = 9
What is √81
A phone password uses 4 numbers. Digits can repeat. How many passwords are possible?
10,000
Find the mean and median for each date set
53,58,60,51,59,35,58,59,46
Mean:52.3
Median: 53
what are the percentages in a normal distribution graph?
The percentages are 34%, 13.5%, 2.35%, 0.15%
What is the formula to find z score?
what is Z=x-m/o
Simplify √64
What is 8
- 1 president
- 1 vice pres
- 1 secretary
How many ways can the officers be chosen
2,730
A data set has a minimum value of 14 and a maximum value of 39. what is the range
What is 25?
what is the total area under a normal distribution curve equal to?
It all equals to 100%.
You scored an 85 on a biology exam. The class average is 75, and the standard deviation is 5. How many standard deviations above the average are you
what is 2
Solve √x=12
What is 144
A restaurant lets choose:
- 2 buns types
- 3 meats
-5 toppings
- 4 sauces
You must choose 1 bum, 1 meat, 2 different toppings, and 1 sauce
How many different burgers are there?
240
5,7,8,7,9,10,7,12
what is 7?
According to the normal distribution rule, what percent of data is found within 2 standard deviation of the mean?
About 95%
The scores on a science test are normally distributed with a mean of 78 and a standard deviation of 12.A student scored 96 on the test. What is the student's z-score? Round your answer to the nearest hundredth.
What is 1.5
Simplify √50
What is 5√2
A gaming tournament has 12 players. Gold, silver, and bronze medals will be awarded. How many different ways can the medals be given out?
1,320
Find the standard deviation of the data set
4,6,8,10,12,
In a normal distribution, where are the mean, median, and mode located?
They are all the same value at the center of the distribution.
The heights of students at a high school are normally distributed with a mean of 67.5 inches and a standard deviation of 2.8 inches. A student has a z-score of -1.75. What is the student's height? Round to the nearest tenth of an inch.
what is 62.6 inches.
Solve √(2x+1) = 7
What is 24