Question

Please help!!!! Statistic...
Assume that the readings on the thermometers are normally distributed with a mean of 0 and standard deviation of 1.00 Celsius. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to P97, the 97th percentile. This is the temperature reading separating the bottom 97% from the top 3%.
Thank you!!! :D

Answer 1

I already have the graph.

Answer 2

@jim_thompson5910 Hi Jim,
Quick question I know you might have the answer. Why the Z score is =1.88?
Please help! ;)

Answer 3

do you have a calculator?

Answer 4

Yes! the TI-30xiis

Answer 5

hmm don't know if that calc has the statistics tools you need in this case

Answer 6

I don't think so, because the teacher didn't emails us the formula for us to use it on the calculator, she usually does.

Answer 7

ok then you'll have to use a table

Answer 8

I we have to use the table.

Answer 9

Yes, she sent us the whole table. I have it with me.

Answer 10

ok can you post it here please

Answer 11

Ok!

Answer 12

http://wps.aw.com/aw_triola_stats_series/

It's the 6th and 7th page.

Answer 13

which book are you using?

Answer 14

Elementary Statistic, Mario F. Triola 11th Edition

Answer 15

look at the table on pg 6, look for the value 0.97 or something close to it

Notice how 0.9699 is very very close to it

This value is found at the row starting with 1.8 and it's in the column that starts with .08

So this means that P(Z < 1.88) is roughly 0.9699 according to the table

So P(Z < 1.88) is roughly 0.97

Answer 16

Ok, I looked the table and I saw that. But do I know that it will be 1.88? Do I have to use a formula to do it so first?

Answer 17

no, the row 1.8 combines with the column .08 to get 1.88

Answer 18

no formula is needed

Answer 19

Yes, I undertand tha part..

Answer 20

But the won't give this answer. Z=1.88. I have to figure it out..

Answer 21

How you find this answer? I know it might be a silly question.

Answer 22

The answer is 1.88 degrees Celsius since the mean is 0 degrees Celsius and the std deviation is 1 degree Celsius

Answer 23

not sure what you're asking exactly

Answer 24

I know is confusing through this way..

Answer 25

I go to the table and look .97 and the Z score is something else.

Answer 26

let me see

Answer 27

which page are you looking at?

Answer 28

I got the wrong, they gave me the right one which is 1.88. But once you go and look for the z on the tables is different.. You understand what I mean, now?

Answer 29

Answer**

Answer 30

Page 7

Answer 31

Ok, I think I know what you meant.... So i have to look to the clsest .97 which .9699 on the table.... I am sooooooooo DUMMY!!

Answer 32

no you're not, but I'm glad you're starting to see what I mean

Answer 33

OMGoshhhh!!! It took almost 3 days to figure it out

Answer 34

that's ok, as long as you get it now, that's all that matters really

Answer 35

Thank so much!!! You lifesaver!!! jejejeje!!

Answer 36

you're welcome