NSE 212 Week 7 - The Normal Curve & Z Scores
why is probability important in statistics? - correct answer✔ ✔
probability establishes a connection between samples & populations
all probabilities range from: - correct answer✔ ✔ 0-100%
how do we calculate the probability of an outcome? - correct answer✔
✔ number of cases divided by the number of outcomes
the area under the curve of a frequency polygon represents: - correct
answer✔ ✔ 100% of all cases
sections of the area under the curve of a frequency polygon represents:
what does this provide us with? - correct answer✔ ✔ proportions of
all cases
provides us with probabilities
, what are the proportions of cases under the curve of a frequency
polygon? - correct answer✔ ✔ 0.13%
2.15%
13.59%
34.13%
(then repeats in the opposite sequence)
what do the proportions of cases under the curve of a frequency polygon
represent? - correct answer✔ ✔ each represents one standard
deviation away
in any normal distribution we know that _________% of scores fall 1SD
above the mean - correct answer✔ ✔ 34.13%
in any normal distribution we know that _________% of scores fall 2SD
above the mean - correct answer✔ ✔ 13.59%
in any normal distribution we know that _________% of scores fall 3SD
above the mean - correct answer✔ ✔ 2.15%
why is probability important in statistics? - correct answer✔ ✔
probability establishes a connection between samples & populations
all probabilities range from: - correct answer✔ ✔ 0-100%
how do we calculate the probability of an outcome? - correct answer✔
✔ number of cases divided by the number of outcomes
the area under the curve of a frequency polygon represents: - correct
answer✔ ✔ 100% of all cases
sections of the area under the curve of a frequency polygon represents:
what does this provide us with? - correct answer✔ ✔ proportions of
all cases
provides us with probabilities
, what are the proportions of cases under the curve of a frequency
polygon? - correct answer✔ ✔ 0.13%
2.15%
13.59%
34.13%
(then repeats in the opposite sequence)
what do the proportions of cases under the curve of a frequency polygon
represent? - correct answer✔ ✔ each represents one standard
deviation away
in any normal distribution we know that _________% of scores fall 1SD
above the mean - correct answer✔ ✔ 34.13%
in any normal distribution we know that _________% of scores fall 2SD
above the mean - correct answer✔ ✔ 13.59%
in any normal distribution we know that _________% of scores fall 3SD
above the mean - correct answer✔ ✔ 2.15%
