Statistic overview
What's the mean, median, mode, and range of 2, 3, 3, 4, 5, 6, 7, 9, 10, 11
mean=6
median=5.5
mode=3
range=9
Describe dispersion.
Dispersion is the measure of spread/variability in a data set.
descibe normal distribution.
It's the probability distribution that is symmetric about the mean, showing the data near the mean are more likely to occur near the mean rather than far from it.
describe what linear means.
linear is when the plot points on the graph go in a straight diagonal line.
Describe mean, mode, median, and range.
mean- is the average of the set
mode- number or numbers that appear the most in the set
median- middle value of the set
range- difference between the highest and lowest numbers from the set.
descibe mean absolute deviation
Average distsnce between each data point and the mean
describe Z-score
measure exactly how many standard deviations above or below the mean a data point is.
describe correlation.
correlation is when the points on a graph make a line
What are box and whisker plots used for?
It's a way of showing data among the quartiles.
describe standard deviation
measure of how disperesed the data is in relation to the mean
use z-score with the mean being 81 and standard deviation of 5.
A. 65
B. 83
C. 100
A= -3.2
B= 0.4
C= 3.8
Describe the non-linear for a scatter plot.
Non-linear is when there's a correlation, but the line isn't a straight diagonal line.
What are stem and leaf plots for?
what is variance
measurement of the spread between numbers in the data set
using the following set to find the z-score of
44
68
96
(100, 92, 92, 84, 68, 84, 92, 52, 56)
44= -2.22
68= -0.74
96= 0.99
describe no correlation
when the points on a graph cannot make a straight line and do not have a line of best fit
Why are graphs important?
It groups data by intervals for easy viewing of data.
What is the mean, MAD, variance, and standard deviation of the following data set?
-10, 0, 10, 20, 30.
Mean=10
MAD=12
Standard deviation=14.14
variance=200
what is the line of best fit?
The line of best fit is a line that is put on the graph that is surrounded by the most plot points, (usually able to make a straight line)
why is the line of best fit important
helps us see trends or average of data