Question

A proposed null hypothesis states that there is no difference between the mean weights of the population of two neighboring districts. The sample mean difference is 12 kilograms, and the standard deviation of the distribution of the difference between sample means is 9 kilograms. Which statement is true?
A.The null hypothesis must be accepted if we choose the 68% confidence level.
B.The null hypothesis must be accepted if we choose the 95% confidence level.
C.The null hypothesis must be rejected if we choose the 99.7 % confidence level.
D.The null hypothesis must be rejected if we

Answer 1

choose the 100% confidence level.
E.The null hypothesis must be rejected if we choose the 95% confidence level.

Answer 2

@uri

Answer 3

and its statistics..

Answer 4

@shkrina

Answer 5

@RANE

Answer 6

Oh my I'm new to this subject,at this moment i can only be a student in this subject not a teacher but wair @hartnn and @ganeshie8 @amistre64 @whpalmer4 are pretty good,They pay help you.

Answer 7

pay?

Answer 8

may*

Answer 9

oh alright

Answer 10

i think its D bt not sure though

Answer 11

is there a formula?

Answer 12

no i didnt use any formula and neither do i think there is any for this

Answer 13

so are you like 50% sure its that or is it just a guess

Answer 14

70% sure

Answer 15

alright, thank you(:

Answer 16

yw:)

Answer 17

@AccessDenied @mathslover

Answer 18

?

Answer 19

why did you tag people?

Answer 20

@amistre64


because they may help u

Answer 21

im fine now

Answer 22

12/9 = 4/3 = 1.33

this tells us that 12 is 1.33 standard deviations from the mean

Answer 23

i already did this one and probably got it wrong ):

Answer 24

the answer options suggest the empirical rule

68 is within 1 sd
95 is within 2 sd
99 is within 3 sd

we reject the null if we are outside of our boundaries:

1.33 is greater then 1, so we reject it 68 Clevel
1.33 is less then 2, so we fail to reject it 95 Clevel
1.33 is less then 3, so we fail to reject it 99 Clevel

Answer 25

your so good at stat lol

Answer 26

youve given me alot of practice ;)

Answer 27

help me wit my newest problem please (: