Question

pic is attached

Answer 1

Just remember, to be a valid distribution the probabilities must sum to one. that is,
\[\sum_{i=1}^{n}p \left( x _{i} \right)=1\]

Answer 2

For which of these is that true?

Answer 3

ok so wait whats p?

Answer 4

Idk what to when the top of the summation has an N

Answer 5

Here's the difference... generally n is used for a sample and N is used for a population. In either case, it's just a number. You just have to sum over all possiblities.

Answer 6

oh wait its just asking which probabilities add up to 1 right?

Answer 7

Exactly!!!

Answer 8

B, D, & E?

Answer 9

I believe so

Answer 10

oh :p ok.

Answer 11

ok so I just got a question asking for a variance of a table

Answer 12

follow the exact steps u gave above right?

Answer 13

not the excel ones. the steps u sent me when u thought I was talking about the FIRST question I posted.. the 2nd pic,, on the OTHER CHAT

Answer 14

actually could u list the steps again in case to find variance

Answer 15

Yeah, send me the table and we can compare what we get.

Answer 16

ok

Answer 17

so the 1st step is to find mean

Answer 18

they give u mean which is 20.59

Answer 19

that's what I got

Answer 20

well yea they give it 2 u. but how do use that t find variance again?

Answer 21

sorry I really not to MOVE ON :(

Answer 22

It's a process but you can get it!

Answer 23

ok thank u! yay I did get 23.18 I think

Answer 24

one more!!!

Answer 25

true or false!

Answer 26

nvm!

Answer 27

OHHH FOR THE VALID PROBABILITY QUESTION I ASKED U ABOUT IMISSED IT!!!! CUZ IT SAID "WHICH IS NOT"!!! D:D:D:

Answer 28

This one is binomial. Ichiro either gets a hit or doesn't and the prob of a hit is 0.350 and he has 3 independent, identically distributed trials.
Therefore E(X) = Expected number of hits = n*p = 3* (0.350) = 1.05.

Answer 29

Sorry about that, I missed it too!

Answer 30

:(

Answer 31

that and another question caused me to get a 72 on that assignment.

Answer 32

but i can raise that if u can HELP ME W/ NORMAL CURVES :(

Answer 33

Do you have a standard normal table?

Answer 34

yes come to the new question I posted. its the same q. but on a new chat link. I tagged u