Probability & Stats for MCAS

Probability & Stats for MCAS

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MOde

-the number that shows up the MOst

Mean/Average

-Add up all the numbers

-Divide by how many numbers you added

Multiple Choice

Find the mean:
28, 18, 19, 18, 17

• 20
• 18
• 11
• 19

Median

-The middle of a set of numbers

-Put the numbers in order from smallest to largest

-Find the middle

Multiple Choice

Find the median for the set of numbers:

41, 13, 21, 83, 54, 37, 18, 66, 72

• 44

• 37

• 54

• 41

Quartiles

-the median is the middle

-Quartile 1 (Q1) is the middle of the bottom half

-Quartile 3 (Q3) is the middle of the top half

-So you follow the same procedure as you do for median

Minimum & Maximum

-Minimum: smallest number in set

-Maximum: largest number in set

Range

-Range=max-min

-The spread from the smallest to largest

Box & Whisker Plot

-Summarizes the data

Interquartile Range

-Q3-Q1

-How far is it bewteen the third and first quartile

-How big is the box

-What is the spread of the middle 50%

Multiple Choice

• A

• B

• C

• D

Multiple Choice

What is the Interquartile Range (IQR)?

• 62

• 4

• 62

• 8

Multiple Choice

What is the minimum value?

• 64
• 58
• 66
• 61

Multiple Choice

What is the maximum value?

• 64

• 58

• 66

• 61

Multiple Choice

What is the range?

• 64

• 8

• 66

• 61

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Fill in the Blanks

Fill in the Blanks

Multiple Choice

• 1

• 2

• 3

• 4

Multiple Choice

• 30-35

• 35-45

• 35-55

• 30-55

Multiple Choice

Which has a larger IQR?

• Zach
• Steven
• They have the same IQR

Open Ended

Probability

-How likely it is for an event to occur
-Between 0 and 1

Multiple Choice

What is the probability of selecting a heart from a deck of 52-cards?

• 1/52

• 13/52

• 26/52

• 10/52

Multiple Choice

What is the probabilty of rolling an even number on a game die.

• 1/6

• 2/6

• 3/6

• 5/6

Multiple Choice

What is the probabilty of NOT rolling a 3 on a game die.

• 1/6

• 2/6

• 3/6

• 5/6

Probability of two events happening together

• Multiply the two probabilities

• The probability of rolling two dice and getting a 3 on the first die and a 5 on the second die is is 1/6*1/6 or 1/36

• The probability of pulling two Kings from a deck of cards is 4/52*3/51

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D