Final exam (chapters 1-10)

Question 1

what are the 3 things you need to describe a distribution?

Answer 1

Shape, center, spread

Question 2

Standard deviation of the mean formula

Answer 2

sigma/the square root of n

Question 3

Standard deviation of p hat

Answer 3

all square rooted [p(1-p)/n]

Question 4

Type I Error

Answer 4

Reject the null hypothesis when the null hypothesis is true. This decision would be incorrect. Denoted H0

Question 5

Type II Error

Answer 5

Do not reject the null hypothesis when the alternative hypothesis is true. Denoted H1

Question 6

Alpha

Answer 6

P(Type I Error) = P(rejecting H0 when H0 is true)

Question 7

Beta

Answer 7

P(Type II Error) = P(Not rejecting H0 when H1 is true)

Question 8

P-value

Answer 8

A​ P-value is the probability of observing a sample statistic as extreme or more extreme than the one observed under the assumption that the statement in the null hypothesis is true.

Question 9

The

Answer 9

The criterion is if ​P-value​, reject the null hypothesis.