Variability
How do you find the range?
Largest number - Smallest number
What quarter of data would a high outlier be in?
Fourth Quarter
If VC hit a ball every 4 out of 25 times. Out of those 4 hits, one of them is a homerun. What is the probability of VC hitting a homerun.
4%
What's the interquartile range of 10, 4, 1, 5, 8, 9, 7
9-5 = 4
The population median and the population mean are identical. What kind of histogram is it
Sytemmetric
What does it mean when you measure the variability of set of data?
You are measuring the dispersion of data. how spread out it is
What percentile is median?
50%
You normally 84, 87, 90, 78, 86 on past 5 exams. What's the chance you score over an 85 on this upcoming exam.
60%
What's the sample median 32, 28, 38, 49, 35, 36
35.5
What type of histogram is when the median is larger than the mean
Negatively Skewed
When everything is scattered, what kind of dispersion is it?
High Dispersion
The first quartile is what percentile of data
25%
A basketball player hits 43% of three pointers. How many would he make if he shot 25.
10.75
What's the outlier 150, 267, 268, 789, 254, 178, 234
789
what type of histogram is when the mean is larger than the median
Positively Skewed
When everything is close to the mean, what kind of dispersion is it?
The third quartile is what percentile of data
75%
If you flips a coin three times, what is the probability and lands heads every single time
What's the sample mean 67, 267, 86, 78, 10, 36
90.67
What histogram has two points that are even on each side
Symmetric bimodal
What are the most common ways to measure variability
Variance or Standard Deviation
How do you find the Interquartile Range.
First quartile - third quartile
There are 5 red balls and 5 blue balls. What is the chances you select two red balls.
22.22%
The sample variance of 10, 17, 9, 22
37.67
What's the definition of a histogram
A frequency distribution chart.