Standard Deviation
What does a small standard deviation tell you about a data set?
It means the data is close to the average (mean) less spread out.
Is 2^x growth or decay?
Growth
What is the pattern in 2, 4, 8, 16...?
Times 2
What does IQR stand for?
Interquartile Range
What is slope?
Rise Over Run
Find the standard deviation of the data set: 4, 6, 8, 6, 6.
Mean = 6; SD ≈ 1.41
Is 0.5^x growth or decay?
Decay
What comes next: 100, 50, 25...?
12.5
What does an outlier mean?
A number that is way bigger or smaller than the rest
Is a line going up positive or negative slope?
positive
How does standard deviation help compare two sets of test scores?
It shows which group’s scores are more spread out or more consistent.
What happens in exponential growth?
It gets bigger fast.
What is the first number called in a sequence?
First Term
Is 100 an outlier in the set: 1, 2, 3, 4, 100?
Yes
What is the slope of y = 2x + 3?
2
What is the first step when finding standard deviation by hand?
Find the mean of the data.
What happens in exponential decay?
It gets smaller fast.
What is the number you multiply by called?
Common ratio
Do outliers make data weird or normal?
Weird
What is the slope of a vertical line?
undefined
Which data set is more consistent: one with a standard deviation of 2 or 5? Explain.
2 is more consistent because the numbers are closer to the mean.
Is 3(1.1)^x growth or decay?
Growth (1.1 is bigger than 1)
Is 5, 10, 20 a geometric sequence?
Yes, because you're multiplying by 2
Q1 and Q3
What numbers do we use to find IQR?
Free Guess
Free Guess