Find the area to the right of a z score of 2.75 under a standard normal distribution curve.
A.
1.9200
B.
0.0030
C.
0.9970
D.
0.6000

Question

Find the area to the right of a z score of 2.75 under a standard normal distribution curve.
A. 
1.9200
B. 
0.0030
C. 
0.9970
D. 
0.6000

ryanveach · Answer

@satellite73

satellite73 · Answer

you need a table for this

ryanveach · Answer

i have one but not sure how to use it

satellite73 · Answer

find 2.75

ryanveach · Answer

then what

satellite73 · Answer

that gives you the area to the left of that number
what did you see?

ryanveach · Answer

it was .99693 which rounded to the answer choice .9970 but it said it was wrong

satellite73 · Answer

that is to the left

satellite73 · Answer

you are asked for the area to the right

ryanveach · Answer

shiza

satellite73 · Answer

since the total area under the curve is 1, you want $$-1.997=.003$$

satellite73 · Answer

typo there, i meant $$1-.997=.003$$

ryanveach · Answer

well i shall try that next time i get it what do you know about finding the area between 2 zscores

satellite73 · Answer

ok you know the total area is 1 right?

ryanveach · Answer

ya nm i figured it out but can you explain what this next question means

satellite73 · Answer

suppose you have a z score of 1, area to the left is .84 (about) and another z score of -2.  area to the left is .228 
so area between them is $$.84-.228$$