Question

@directrix

Answer 1

http://k12.kitaboo.com/k12/ebookpdf/maths05/17501_HS_PS_chapter04.pdf

Answer 2

pages 166-167

Answer 3

is question 4 -> Euan
question 6 -> Felicia
question 10 ->buffalo grass; it has the greater corresponding raw score.
question 22 -> Company A is more likely its z-score of 2.82 is greater

Answer 4

@dan815

Answer 5

@kropot72

Answer 6

Euan's z score is at the greatest distance from the mean.

You did not say which test. That is part of the question. @Daniellelovee

Answer 7

test 2

Answer 8

@Directrix

Answer 9

Question 6. The greatest improvement is not by Felicia. Felicia's z-score went from 1.25 to 1.5, and increase of 0.25. Who has the greatest improvement?

Answer 10

....an increase of 0.25*

Answer 11

Dave?

Answer 12

and are the rest correct then?

Answer 13

you there? @kropot72

Answer 14

Yes, Dave improves from -0.5 to 1.

Question 22. The lower value of z-score for 43 lozenges corresponds to a higher probability of producing a packet of 43 lozenges. When the cumulative probabilities are compared, the cumulative probability of Company B producing packets with more than 43 lozenges is 0.0028, whereas the cumulative probability of Company A producing packets with more than 43 lozenges is 0.0024.

Answer 15

im confused with 22

Answer 16

is company B more likely with a score of -2.77?

Answer 17

Look at it this way, if the z-score of Company B for 43 lozenge packets was 1, and the z-score of Company A for 43 lozenge packets was 2.82, which company would be more likely to produce a packet of 43 lozenges?

BTW the actual z-score for Company B is 2.77.

Answer 18

ok so then would it mean that A is closer or that B is closer?

Answer 19

closer to the mean?

Answer 20

The z-score of Company B is closer to the mean.

Answer 21

alright thank you :)

Answer 22

and are the rest correct?

Answer 23

You're welcome :)
For question 10, I found the growing period for Bermuda grass to be 11.75 days and for Buffalo grass 15.25 days.