Permutation and Combination
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Vocab
Conditional Probability
Discrete or Continuous
100
How many different ways can two students be assigned to five tutors if only one student is assigned to each tutor?
5!/(5-2)!=20
It's permutation because the order of the students doesn't matter
100
What is the most common m&m color?
Orange, the average bag contains 21% Orange.
100
Experiment
sample is divided into 2 groups (experimental and control group)
100
What is the formula for conditional probability?
100
Is this graph discrete or
Continuous
200
How many 4-colored groups can be selected from 13 different colored balloons?
13!/(13-4)!3!=715
200
What is the probability of drawing a jack out of a deck of cards?
What is the probability of drawing an ace of hearts?
4/52 ; 1/52
200
Permutation
an arrangement of a group of distinct objects in a certain order
200
King High School tallied the # of males and females that were member of at least one after school club.
a) a student is a member of a club given that he is a male
G Clubs No Clubs Total
M 156 242 398
F 312 108 420
468 350 818
156/398
200
Give an example of discrete data and a continuous data.
(answers will vary) ex:
Discrete:
- Number of children in a household
- Number of languages a person speaks
- Number of people sleeping in stats class
Continous:
- Height of children
- Weight of cars
- Time to wake up in the morning
300
How many different ways can you pick a group of 3 people from a class of 10.
C(10,3) = 10!/(7! · 3!) = 10 · 9 · 8 / (3 · 2 · 1) = 120.
300
what century was statistics introduced?
mid 17th century
Fun Fact!
William Playfair was a secret agent for Great Britain during the French Revolution. He was the founder of graphical methods of statistics.
300
Independent events
the occurrence of one event does not affect the probability of a second event occurring.
300
At a restaurant, 25% of customers order chili. if 4% of customers orders chili and a baked potato, find the probability that someone who orders chili also orders a baked potato.
P(BP/Chili)=0.04/0.25=0.16
16% probability someone orders a chili also orders a baked potato.
300
Is this graph discrete or continuous?
Discrete
400
Jack has a reading list of 12 books. How many ways can he select 9 books from the list to checkout of the library?
12!/(12-9)!=220
400
What is a positively skewed graph
400
What is a Box and Whisker
a graphic way to display the median, quartiles, and extremes of a data set on a number line to show the distribution of the data.
Extra 500 points if you can put it in a calculator
400
A student is not a member of a club give that she is a female
G Clubs No Clubs Total
M 156 242 398
F 312 108 420
468 350 818
242/350
400
What is the difference between Discrete and Continuous?
Discrete - he values belonging to the set are distinct and separate (unconnected values)
Continuous - values belonging to the set can take on ANY value within a finite or infinite interval