4.2 Flashcards
1
Q
Why are samples taken?
A
Samples are taken for the purpose of efficiency.
2
Q
What is the skewing effect?
A
A change in sample mean and median.
3
Q
What is bootstrapping?
A
Any test that relies on random sampling with replacement.
4
Q
Why use bootstrapping?
A
When a well known distribution is not known it allows for estimation of the sampling distribution.
5
Q
What is the margin of error?
A
The amount added or subtracted from the proportion.
6
Q
What are confidence intervals?
A
” We are x% sure that the true proportion is between the lower and upper bound.”
7
Q
What is a t-score?
A
Unlike a z-score that came from normal distribution a t-score comes from a Student’s t-distribution.
