Question

Stats help please?

Answer 1

let me help

Answer 2

Can you draw a tree diagram of the possibilities?

Answer 3

i don't really know how to draw it on here i can try and do it on word and paste it tho

Answer 4

there is a draw tool
for the first shot, she either makes it with probability 60%, or misses with probability 40%, right?
So the first branch representing the first shot will look like so so far so good?

Answer 5

yes

Answer 6

Good, so if she makes the first shot she has a chance at a second, which again she may or may not make
Where will the fork representing this event be? On the upper or lower branch of the tree we've drawn so far?

Answer 7

there be another branch on the .6 that branches out to be .7 because the confidence level goes up i think so the top one

Answer 8

right! so let's draw thatso we have our diagram
now what is the probability that she gets zero points?

Answer 9

30% i think, sorry i lost my internet connection

Answer 10

30% is the probability that she misses her second shot, but she doesn't even get a chance to make her second shot if she didn't make the first (i.e. if she didn't already have one point)

She will get zero points only if she misses her first shot.

Answer 11

oh so the answer is 0?

Answer 12

No. What needs to happen for her to get zero points? What is the probability of that event happening?

Answer 13

she has to miss the first shot

Answer 14

right, and what are the odds of that?

Answer 15

theres a 40% chance

Answer 16

right! so that's the odds of getting zero points

Answer 17

this event corresponds to the lower branch of the tree

Answer 18

what has to happen for her to get a total of one point?

Answer 19

she has to make the first shot and miss the second

Answer 20

good :)
to find the probability of this event, we follow the branches of the tree that correspond to that even, and multiply the probabilities of each branch.

Answer 21

what is the product of the probabilities along this path?

Answer 22

.18

Answer 23

great!
now I will just ask you: what is the probability she gets to points?

Answer 24

two*

Answer 25

.42

Answer 26

nice!
so which event is most probable?

Answer 27

the second 1

Answer 28

I don't understand your answer.
what are the odds she gets 0 points?
what are the odds she gets 1 point?
what are the odds she gets 2 points?

Answer 29

the odds of getting 1 point is .18
the odds of getting 2 points is .42
and the odds of getting no points is .4 i think

Answer 30

correct! so which number of points is most likely?

Answer 31

getting 2 points

Answer 32

right :)