Hypothesis Testing

Question 1

Suppose a cancer surveillance registry tells us that the average age at diagnosis of beast cancer in women living in the US is 62 years old
what is the population and sample?

Answer 1

population: all women living in the US
sample: those women who have breast cancer

Question 2

null hypothesis?

Answer 2

the population mean (of age at diagnosis of breast cancer)

Question 3

alternative hypothesis?

Answer 3

the pop. mean….is not equal

Question 4

Ideally, T=0 when the null hypothesis is true. T or F?

Answer 4

True

Question 5

what is the test statistic?

Answer 5

T=(x w/ a hat-null hypothesis)/SE
-SE = sample standard deviation/sq root of the # of samples

Question 6

reject null hypothesis when T is….?

Answer 6

far away from 0 (positive or < than the cv)
-T is in the red area
-T exceeds the critical value

Question 7

accept null hypothesis when T is…?

Answer 7

closer to 0 (positive or > than the cv)