Given a mean of 150 and a standard deviation of 25:

Define the interval about the mean that contains 75% of the data.

Use a z table.

Question

Given a mean of 150 and a standard deviation of 25:

Define the interval about the mean that contains 75% of the data. 

Use a z table.

nottim · Answer

What formula are you suppose to use for this?

nottim · Answer

Hello?

nottim · Answer

oh, isn't is like z=x-u/o (stdev)?

nottim · Answer

Do you have a textbook, formula sheets or notes? Please respond.

anonymous · Answer

like this

nottim · Answer

Exactly.

nottim · Answer

Now, is that the correct formula, or not?

anonymous · Answer

oh yeah

nottim · Answer

Yes?

anonymous · Answer

yes that the right formula

nottim · Answer

Now, how do you get X from 75%

anonymous · Answer

by using the z table

nottim · Answer

Alright, what is teh value?

nottim · Answer

In the z table?

anonymous · Answer

yes

nottim · Answer

What's teh value?

nottim · Answer

Because once you get that, all you have to do is plug it into the formula.

anonymous · Answer

these are all the answer choices 148.85 to 151.15

	
121.25 to 178.75

	
125 to 175

	
133.25 to 166.75

nottim · Answer

What's your answer right now?

anonymous · Answer

idk i dont have 1 which one do you think it is

nottim · Answer

I try not to give the answer.

anonymous · Answer

pls bro i need it im on a recovery class and im a senior pls i dont have much time

nottim · Answer

Don;t you just plug it into the formula?

nottim · Answer

You said that was the correct formula right?

anonymous · Answer

to hard trust me i cant

nottim · Answer

Darnit man you're a senior. you can do this. you got a textbook, notes? Or is the formula not correct?

anonymous · Answer

it is i just need the answer pls bro

nottim · Answer

What do you think the answer is?

anonymous · Answer

125 to 175 right man

nottim · Answer

what was the value you got from teh table?

nottim · Answer

i don;t have the table on me right now.

anonymous · Answer

no clue man

nottim · Answer

You're the one in the class. How do you not have the table?

nottim · Answer

Again, you're a senior.

anonymous · Answer

can u pls give me the answer no disrespect but im in a rush man

nottim · Answer

hey, i can't really calculate it all out, because i'm in my 3rd year of university, while helping everyone else with their problems.

anonymous · Answer

thats messed up man

nottim · Answer

Trust me, lots of people have a lot of things going on in their lives/

nottim · Answer

I get it, you have problem, you want answers, but kids like you, when they reach university, they have a really hard time because nobody gives out the answers. i'm jsut trying to shift some kids away from getting battered in university.