Question

What is the positive z-score of 3.75

Answer 1

@Jaynator495

Answer 2

@mathway

Answer 3

Take a look at the z-score chart.

Answer 4

zscore is telling you how many standard deviations you are away

Answer 5

A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standard deviation were calculated. Based on the results, the exam creator claims that on the same exam, nine times out of ten, seniors will have an average score within 5% of 75%.

Is the confidence interval at 90%, 95%, or 99%? What is the margin of error? Calculate the confidence interval and explain what it means in terms of the situation.

Answer 6

Ya I know but It only goes up to 3.4

Answer 7

you can actually use a integral formula to find out the probability there

Answer 8

ok

Answer 9

Ok but im finding the z-score for the question above that may help

Answer 10

9/10 is same as 90/100 = 90%

Answer 11

or you can simply help me solve it

Answer 12

oh so that is the confidense interval?

Answer 13

yes 90% confidence interval is giving you the interval for the xmin and xmax where there is 90% of the proablity
so the interval
[5,75] is 90% of the population

Answer 14

I got (75-3.75)% and (75+3.75)% for error thing am I right

Answer 15

use excel function = NORMSDIST(Z-value)

Answer 16

Is 3.75 the z value though @dan815

Answer 17

doge

Answer 18

My bad m8 I dont know how to do this

Answer 19

@SithsAndGiggles

Answer 20

@zzr0ck3r

Answer 21

@vera_ewing

Answer 22

@frankwillfindyou Hi fellow doge