Unit 2: Hypothesis testing Flashcards
1
Q
What is accuracy ?
A
How close a given set of observations or measurements are to their true value
2
Q
What is precision ?
A
How close the measurements are to each other
3
Q
What is a type one error ?
A
A false positive
4
Q
What is a type two error ?
A
A false negative
5
Q
What are 2 assumptions made when using chi-squared ?
A
1) The samples must be randomly selected from population and are independent from each other
2) The sample size must be large enough so the expected count in each cell is greater than or equal to 5
