Question

find the z score for the standard normal distribution where
P(z < +a) = 0.8980

Answer 1

Since the middle of the Standard Normal Distribution is 1/2 or 0.50000, you may be able to find 0.8980 - 0.5000 = 0.3980 shaded between this spot and the Mean.

Answer 2

uhm shouldn't it be 1-0.8980 = 0.102?

Answer 3

okay i am confused is it the first one or the second one

Answer 4

it is whatever the table in the back of the book gives ....

Answer 5

if you have a left hand table, then look for the number in the field that is closest to the given value in the problem.

otherwise, use the inverse Normal function of a ti83

Answer 6

when i look at the z table and line them up the two numbers i get are 1.2 and 0.07

Answer 7

then add them :) tables are weird i admit

Answer 8

1.2 + .07 = 1.27

so the z score, assuming you have the right row, column is 1.27

Answer 9

1.27 is good

Answer 10

oh so you add it i was trying out how to do this math is not my strongest subject and statistics is even worse thank you

Answer 11

:) you are doing fine

Answer 12

no not really this class is so hard
its a learning in progress

Answer 13

how do i put this into a problem

Answer 14

P(z < +a) = 0.8980 do i put the answer i got in-between the parentheses

Answer 15

i would just say: a = 1.27, if you have to explain how, then just tell what you did with the table.

Answer 16

ok thanks

Answer 17

youre welcome, good luck