Random Variation

Question 1

variability of results caused by chance fluctuation is?

Answer 1

random variation

Question 2

Null hypothesis vs alternative hypothesis?

Answer 2

Null - there is no difference

Alternative - there is a difference

Question 3

P-value measures

Answer 3

How “consistent results are with the null hypothesis”

or probability that the difference seen is due to chance alone

Question 4

When p is high, conclusion of null?

Low p?

Answer 4

high p = do not reject null

low = reject null hypothesis

Question 5

p-value has to be what to reject null

Answer 5

0.05

Question 6

p value depends on sample size?

Answer 6

lol yes

Question 7

High sample size studies’ results will be more…

Answer 7

precise

Question 8

Hypothesis testing ONLY done when making a…

Answer 8

comparison

Question 9

A confidence interval means that…

Answer 9

The 95% confidence interval correctly predicts true population values 95% of the time.

Question 10

Raising n will make CI…

Answer 10

shorter with same confidence level