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Question 1

Biomodal, unimodal, trimodal?

Answer 1

Modes within a fraction of the data.

Question 2

Given a response variable (e.g percentile), how do you find the explanatory variable?

Answer 2

Considering IVT holds, you can find the point at that response variable, then find the value of the explanatory variable associated with that point.

Question 3

!!!!Width of distribution c

Answer 3

•Range
•Variance
•Standard deviation
•

Question 4

Range?

Answer 4

Maximum minus the minimum

Question 5

What is the problem of range?

Answer 5

It is biased to sample size since small samples tend to give lower estimate of the range than large sample.

Question 6

Ranges are commonly reported in?

Answer 6

Box plots (max and min value)

Question 7

Interquartile range?

Answer 7

Range of the middle 50% of ordered observations.

Question 8

Variance?

Answer 8

Average squared deviation from the mean.

Question 9

!!!!!Is the amount of variation for different means the same if the standard deviation is the same?

Answer 9

No since the variation is the proportion of the average but the standard deviation is just

Question 10

Skew?

Answer 10

Measurement of asymmetry (refers to the pointy tail of a distribution).