The mean monthy income of workers is $1500 with a standard deviation of $200. The highest paid 20%(.20) of these workers make at least how much?
a. 1332
b. 1900
c. 1756
d. 1668
2006-10-28 11:48:06 · 6 answers · asked by mrkittypong 5 in Science & Mathematics ➔ Mathematics
D.
This is the only answer that makes sense bc b&c are outside the standard deviation and a is way too low for the highest paid workers.
2006-10-28 11:51:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
d. 1668
You want a Z-score slightly less than +1.0
Unstandardized Value: 1668
Sample Mean: 1500
Sample Standard Deviation: 200
Z-Score: 0.8400
2006-10-28 19:02:35 · answer #2 · answered by novangelis 7 · 0⤊ 0⤋
Pick the smallest number - it's a stupidly-worded question.
2006-10-28 18:50:54 · answer #3 · answered by k_e_p_l_e_r 3 · 0⤊ 0⤋
i want to say a. 1332
2006-10-28 18:53:46 · answer #4 · answered by nicholemt_2010 1 · 0⤊ 0⤋
D is My Answer
2006-10-28 19:31:40 · answer #5 · answered by Anonymous · 0⤊ 0⤋
D.
2006-10-29 08:40:39 · answer #6 · answered by Thick Chick 2 · 0⤊ 0⤋