Measures of Central Tendency
Data Displays
Lines of Best Fit (Scatterplots)
Probability & Prediction
Probability
100
What is the mode?
2,5,9,5,7,9,10,31,22,9
Order the data: 2,5,5,7,9,9,9,10,22,31
Find value that appears the most times.
Mode = 9
100
What is the name of this graph?
Dot Plot
100
What do you look at on a data set to determine if the correlation is positive or negative or there is no correlation?
the slope.
100
Give an example of an independent event.
Answers will vary but anything with flipping coins, rolling dice, or replacement is independent.
100
A bag holds 29 marbles. 3 are orange, 17 are purple, 5 are black, and 4 are white. If you reach into the bag and pull one out at random, what is the probability it is either purple or orange?
Write your answer as a simplified fraction, decimal to 4 places and percent.
20/29 = 0.6897 = 68.97%
200
What is the median?
9,8,1,4,2,5,4,11,14
Order the data: 1,2,4,4,5,8,9,11,14
Find Middle Value
Median = 5
200
Name the data set (in order from least to greatest) from the given stem and leaf plot.
(teacher will open link to stem and leaf plot)
34, 39, 44, 50, 54, 57, 61, 63, 65, 65, 65, 67
200
What do you look at on a data set to determine if the correlation is weak or strong?
how close the points are to the line of best fit
200
Your batting avg. is 3 hits out of 8 pitches. How many hits would you expect from 30 pitches?
11.25 = 11 hits
200
A bag holds 29 marbles. 3 are orange, 17 are purple, 5 are black, and 4 are white.
Find P(white, purple, white) WITH REPLACEMENT.
Write your answer as a simplified fraction, decimal to 3 places and percent.
(4/29)(17/29)(4/29) = 272/24389 = 0.011 = 1.1%
300
What is the median and the mean?
11,13,19,18,21,24,16,17
Order the data: 11,13,16,17,18,19,21,24
Mean = 139/8 = 17.375
Median = 17.5
300
Name the 5-number summary for the data set
6,8,8,9,10,11,14,15,19
Min = 6
Max = 19
Median = 10
Q1= 8
Q3= 14.5
300
What is the correlation of the data in the scatter plot?
Positive
300
If 51/133 of the class is below 60%, what percent of the class is passing? (Round to 1 decimal place)
61.7%
300
You buy a case of candies. It contains 6 boxes chocolates, 8 boxes of gummies, and 4 boxes of sour candies. You randomly select boxes to give to your 3 friends.
What’s the probability that the first box is gummies, the second is chocolate, and the third is gummies?
(8/18)*(6/17)*(7/16) = (4/9)*(6/17)*(7/16)
= 168/2448 = 84/1224 = 42/612 = 21/306 = 7/102
7/102= 0.0686 = 6.86%
400
What is the mean, median, mode, and range?
0,0,1,2,5,7,8,9,11,13
These values are already in order.
0,0,1,2,5,7,8,9,11,13
Mean = 55/10 = 5.5
Median = 6
Mode = 0
Range = 13-0 = 13
400
List the 5-number summary from the box and whisker plot
Link to plot : https://www.desmos.com/calculator/avntywmp7c
Min = 1
Max = 15
Median = 10.5
Q1= 6.25
Q3 = 12
400
Someone tells you that the line of best fit is
y = -2x +17 and r = -0.89.
What type of correlation is this? (Pos/Neg/No AND Week/Strong)
Strong Negative
400
There are 134 students. 13% have not responded to chats. How many students have not responded?
17 students
400
A bag holds 29 marbles. 3 are orange, 17 are purple, 5 are black, and 4 are white.
Find P(selecting 4 orange in a row) WITHOUT REPLACEMENT!
Write your answer as a simplified fraction, decimal to 4 places and percent.
0 there are not 4 orange marbles to choose.