One Variable Data
Is the question “how many seconds can hold your breath?” Categorical, quantitative discrete, or quantitative continuous?
Quantitative continuous
What 4 things do you need describe a distribution
Shape, outliers, center, spread.
If the class average is 70 and your test score is 70, what is your z score?
0
What is the mean?
Average of a data set
What is the range?
The difference between the highest and lowest data value.
What is a stem plot
a graph that divides data into 2 parts, the leading digit or the stem, and the final digit the leaf.
What are the 6 distribution shapes you can use to describe a graph?
Unimodal (one peak), Bimodal (two peaks), uniform (all the same level), symmetric (x splits evenly), left skewed (graph goes down to the left), right skewed (graph goes down to the right).
If your z score is a positive number, is your test score above or below the class average?
Above
What is the median?
The middle number in a data set when the numbers are arranged from least to greatest.
What does it mean if your z score is 0?
It means you are completely average
What are the 3 possible measures of center?
Mean median and mode
What are the 5 labels on a boxplot?
Min, Q1, median, Q3, Max, Outliers (bonus point)
What does being in the 99th percentile mean?
You scored above 99% of the class.
What is the name of the number that appears most frequently in a data set?
Mode
What’s the numerical probability of something that is Certain to happen?
100%
What is an outlier
a value that lies an abnormal distance from the other
What’s the empirical rule?
For a typical bell shaped curve, nearly all data falls within 3 standard deviations of the mean.
If your score is 2 standard deviations below average what is your z score
-2
If you have data set 2,4,4,6,8 what is the exact middle value
4
What is the middle half of your data stretching from the 25th-75th percentile
IQR
What is an ogive
A graph that displays the percentile of an interval of variables.
What is standard deviation?
Measures the amount of deviation from the mean
If you have a z score of +1 this means you scored higher than what percentage of the class?
84%
Calculated mean of 10, 20, and 30?
20
What is a histogram?
A bar graph that shows frequency over intervals of numbers instead of distinct categories