U7 Normal Distribution Flashcards
1
Q
probability distributions that deal with discrete data
A
binomial, geometric, hypergeometric
2
Q
which direction is a positively skewed graph’s tail being pulled towards
A
right
3
Q
which direction is a negatively skewed graph’s tail being pulled towards
A
left
4
Q
two humps in a graph
A
bimodal
5
Q
total area under a curve always equals
A
1
6
Q
which distribution is a horizontal line
A
uniform distribution
7
Q
continuous data distributed symmetrically and unimodally
A
normal distribution
8
Q
what precent is within one standard deviation of the mean?
A
68%
9
Q
what precent is within 2 standard deviation of the mean?
A
95%
10
Q
what precent is within 3 standard deviation of the mean?
A
99.7%
11
Q
normal distribution notation
A
X ~ N (μ, σ^2)
12
Q
how to check if normal approx. can be used
A
np and nq are greater than 5
