Question

Question 7.7. Carmela randomly selected 65 stamps from a stamp collection. Eleven of these were commemorative stamps. What is the interval estimate for the proportion of commemorative stamps in the entire collection if the sampling method had a margin of error of 0.025?
(Points : 4)
(0.415, 0.465)

(0.145, 0.195)

(0.085, 0.135)

(0.035, 0.085)

Answer 1

Question 8.8. Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 minutes and 24.5 minutes. What is the study's margin of error?
(Points : 4)
0.5 min

1.65 min

2.25 min

3.3 min

Answer 2

@butterflydreamer

Answer 3

i'm sorry.. i'm not too sure how to do these questions xD

Answer 4

its ok

Answer 5

@willisboys13

Answer 6

@Directrix