Normal Flashcards

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1
Q

qnorm()?

A

Gives −∞ to q

  • Gives the value of ‘x’ within that range (ex., 60 months)
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2
Q

pnorm()?

A
  • Gives the proportion/percentage/probability of individuals in a certain region of the Normal distribution
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3
Q

Z~N(0,1)?

A
  • When used with a q in R code, this z-score will tell you how many SD the data point is from the mean
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4
Q

What is a z-score?

A

A Z-score is a numerical measurement used in statistics of a value’s relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean

If a Z-score is 0, it indicates that the data point’s score is identical to the mean score

  • If the source is normal, the Z scores will also be normal
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5
Q

First quartile?

Third quartile?

A

The first quartile is the first 25% in the distribution

The third quartile is the first 75% in the distribution

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