Download 3Day3 - Carrillo Elementary School

Statistics
BELL CURVE
MEAN
• Average
• Practice:
MEDIAN
• The middle value in a set of numbers
1. Arrange the numbers in order by size
2. If there is an odd number of terms, the
median is the center term
3. If there is an even number of terms, take the
mean of the two middle terms
MODE
• The value that occurs most often
• If no term is repeated, then there is no mode
for the list
RANGE
• The difference between the largest and
smallest values in a list
• Practice:
MEAN, MEDIAN, MODE & RANGE
• Practice Worksheet
STANDARD DEVIATION
• Amount of variation in a bell curve
• Low values indicate the data is close to the
mean
• High values indicate the data is farther from
the mean
• https://www.youtube.com/watch?v=09kiX3p5
Vek
STANDARD DEVIATION
• Practice Worksheet
STANDARD ERROR OF THE MEAN
• The SEM indicates variations of the mean of a sample
population
• We want to know the average height of the human
population
• Take the height of every living human and
calculate the mean (unreasonable)
• Take the height of a sample population and
calculate the mean
• The sample mean is imperfect (SEM indicates how
imperfect)
• https://www.youtube.com/watch?v=BwYj69LAQOI
STANDARD ERROR OF THE MEAN
• Practice Worksheet
CHI SQUARE
• Goodness of fit test
• How well does the data fit the hypothesis
• O = the observed values (aka the data)
• E = the expected values (aka the hypothesis)
• Often the hypothesis will be a “null hypothesis”
aka no statistical difference between the
experimental and control groups
• https://www.youtube.com/watch?v=WXPBoFDqN
Vk
CHI SQUARE
• M&M Lab