A previous analysis of paper boxes showed that the the standard deviation of their lengths is 7 millimeters. A pakcer wishes to find the 98% confidence interval for the average length of a box. How many boxes does he need to measure to be accurate within 1 millimeters?
A) 189 B) 266 C) 49 D) 326
2007-02-22 04:44:17 · 3 answers · asked by Jason K 1 in Science & Mathematics ➔ Mathematics
This is a variation on your previous question. My answer there should help you do this one as well.
2007-02-22 06:16:05 · answer #1 · answered by Anonymous · 0⤊ 0⤋
I have a question......if yahoo answers does your homework for you....how on earth do you pass your tests?
2007-02-22 04:46:50 · answer #2 · answered by to_sassy4_u 5 · 0⤊ 0⤋
just remember.... if you don't know the answer just guess either B or C those are almost always the right answer
2007-02-22 04:49:00 · answer #3 · answered by Dreamer 3 · 0⤊ 0⤋