Hypo testing

Question 1

what is a null hypothesis

Answer 1

nothing is happening so things like u=0 or p=0.5 or u1-u=0

Question 2

what is an alternative hypothesis

Answer 2

somthing is happing, = > < or does not equal

Question 3

alternative for a two sided

Answer 3

does not =
The average blood pressure of patients taking the new medication is significantly different from the average blood pressure of patients not taking the medication

Question 4

alternative for a right-tailed

Answer 4

> The average blood pressure of patients taking the new medication is significantly greater than the average blood pressure of patients not taking the medication.

Question 5

alternative for a left tailed

Answer 5

<, The average blood pressure of patients taking the new medication is significantly less than the average blood pressure of patients not taking the medication.

Question 6

what is a test statistic

Answer 6

measures the distance between our observed data and the hypothesized value relative to the standard error, this quantifies the degree to which the sample data supports or contridicts the null

Question 7

what is a P-vaule

Answer 7

ASSUMING THE NULL HYPOTHESIS IS TRUE, the p-value measures the probability of getting data at least as extreme as the data we got.

Question 8

what do P-values mean

Answer 8

a small P-value is stong evidance against the null whereas a large p-value is evidance against the alternative