Question

can someone correctly show me how to calculate the z score

Answer 1

do u have the distribution info :-
1) mean
2) standard deviation

?

Answer 2

z-score just tells you "how many standard deviations from mean, a particular observation lies"

Answer 3

mean of 62 standard deviation of 4 and a z score value of 48

Answer 4

z score = (observation - mean )/(standard deviation)

Answer 5

plug ur values

Answer 6

what would the observation be? i plugged in 62-48/4

Answer 7

thats wrong

Answer 8

mean = 62
standard deviation = 4
observation = 48

Answer 9

z score for observation of 48 = (48-62)/4

Answer 10

u should get a NEGATIVE z score

Answer 11

D'aww my hunnybear is great with math! Whatever he says is accurate 99% of the time.

Answer 12

:) lol u mean 10 time im wrong in every 1000 attempts ha... thats a lot of error :}

Answer 13

okay try this mean=62 with a SD of 4 find the z score of the value 78 i swear i typed it in right and i got it wrong

Answer 14

z score of observed value 78 = (observation - mean) / (standard deviation)

Answer 15

= (78 - 62)/4

Answer 16

you wud get a POSITIVE z score this time, cuz ur observation is greater than mean.

Answer 17

finally i got it right. now i have to wait for another online retake.. ugh thanks

Answer 18

in stats, it is important to appreciate below differences :-
1) if observation is greater than mean, then z score = POSITIVE
2) if observation is less than mean, then z score = NEGATIVE
3) if observation is same as mean, then z score = 0

Answer 19

good luck ! im sure u wud do great :)