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scZoUnD [109]
3 years ago
10

for a population of 800000 subway riders, the numbers of subway trips taken per rider last january are approximately normally di

stributed with a mean of 56 trips and a standard deviation of 13 trips. approximately how many of the riders took between 30 and 43 trips last january??? ...?
Mathematics
1 answer:
vladimir1956 [14]3 years ago
4 0
So, we have
<span>Z=<span><span>x−μ / </span>σ

</span></span><span>Mean would be = 56
  30 - 56 = |-26| 4
3 - 56 = |-13|
 and
Standard deviation= 13
</span><span>2 - 1 will give us the approximate area
  95/2 - 68/2 = N

   95 -68 = 27

 27 /2 = 13.5
</span>Hence, the answer would be
<span>800,000 * .135
</span>= <span> 108000</span>
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