grouped data and distribution Flashcards

1
Q

histograms

A

graph that displays frequency of different outcomes within a sample

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2
Q

how do you find the estimated mean in grouped data?

A
  • take the midpoint (e.g 51-55= 53)
  • times that by the frequency
  • repeat for each group
  • divide total by the number of observations
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3
Q

normal distribution

A

bell shaped curve, helps predict probability
sometimes occurs in naturally occruing phenonena, mostly uncommon

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4
Q

skew

A

one way distribution, deviates from normal

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5
Q

positive skew

A

height on left side
mean more than median

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6
Q

negtive skew

A

height on right
meadian more than mean

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