Stats Exam 2

Question 1

x̅

Answer 1

Mean

Question 2

μ

Answer 2

population mean

Question 3

Confidence interval

Answer 3

A confidence interval is an interval that contains an unknown
parameter with a certain probability. The probability that the
confidence interval contains the parameter is called the confidence
coefficient or just confidence.

Question 4

Type 1 Error

Question 5

Type 2 Error

Question 6

p-value

Answer 6

The p-value provides the probability of
getting the observed, or more extreme data,
assuming the null hypothesis is true.

Question 7

null hypothesis

Answer 7

a hypothesis that says there is no statistical significance between the two variables

Question 8

α

Answer 8

“alpha” = significance level in hypothesis test, or acceptable probability of a Type I error (probability you can live with). 1−α = confidence level.

Question 9

H0

Answer 9

The null hypothesis, H0, is a statistical proposition stating that there is no significant difference between a hypothesized value of a population parameter and its value estimated from a sample drawn from that population.

Question 10

H1