The author found that in one month (30) days, he made 47 cell phone calls, which were distrubuited as follows: No calls were made on 17 days, 1 call was made on each of 7 days, 3 calls were made on each of two days, 4 calls were made on each of two days, 12 calls were made on one day, and 14 calls were made on one day.
2006-10-06 05:31:11 · 6 answers · asked by Mizz Know It All 4 in Science & Mathematics ➔ Mathematics
Mean of Calls per day
2006-10-06 05:31:37 · update #1
47 calls / 30 days = 1.56666... calls per day on average.
The long way would be to take a weighted average as follows:
( 0 x 17 + 1 x 7 + 2 x 3 + 2 x 4 + 12 x 1 + 14 x 1 ) / 30 days, but lo and behold:
= (0 + 7 + 6 + 8 + 12 + 14) / 30
= 47 / 30
= 1.56666... calls per day
So either way the answer is the same.
2006-10-06 05:36:56 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
Over the 30 day period, 47 calls per 30 days = 47/30 = 1.567 calls/day. The distribution is irrelevant.
If the ? is calls/day only on the days CALLS WERE MADE, then take out the 17 days on which none were made to give (30-17) = 13 and you have 47 calls per 13 days = 47/13 = 3.615 c/d
2006-10-06 12:44:22 · answer #2 · answered by Steve 7 · 0⤊ 0⤋
47/30 = 1.5667
Just take the toal number of calls divided by the total number of days.
2006-10-06 12:36:41 · answer #3 · answered by Draco Moonbeam 3 · 0⤊ 0⤋
(1 x7 + 3x2 + 4x2 + 12x 1 +14x1)/30 = mean calls per day
2006-10-06 12:38:41 · answer #4 · answered by rt11guru 6 · 0⤊ 0⤋
the mean is simple:
47calls/30days=1.57calls/day
If you want the medium, it the # of calls where there were 15 days with <= & 15 with >=
The medium is 0
2006-10-06 17:31:24 · answer #5 · answered by yupchagee 7 · 0⤊ 0⤋
47/30?
1.5666?
2006-10-06 12:37:37 · answer #6 · answered by Anonymous · 0⤊ 0⤋