1. ( point) I hypothesized that girls in my class have the same blood pressure levels as boys. The probability value for my null hypothesis was . So I conclude that the blood pressures of the girls were higher than boys'. Which kind of mistake did I make?

a. Type I error

b. Type II error

c. Type I and Type II error

d. I did not make any mistake .

Ans: Type I error

1. ( point) If a statistical test result is not significant at the level, then we can conclude:

a. It is not significant at level

b. It must be significant at level

c. It must be significant above level

d. It is not significant at level

Ans: It is not significant at level

1. (2 points) A researcher posed a null hypothesis that there was no significant difference...