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Jana1517
14.07.2019 •
Mathematics
Aski gondola carries skiers to the top of a mountain. it bears a plaque stating that the maximum capacity is 14 people or 2324 lb. that capacity will be exceeded if 14 people have weights with a mean greater than startfraction 2324 l b over 14 endfraction equals 166 lb. assume that weights of passengers are normally distributed with a mean of 177 lb and a standard deviation of 41.4 lb. complete parts a through c below. a. find the probability that if an individual passenger is randomly selected, their weight will be greater than 166 lb. nothing (round to four decimal places as needed.)
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Ответ:
we need to find the probability that if an individual passenger is randomly selected, their weight will be greater than 166 lb.
Assume that weights of passengers are normally distributed with a mean of 177 lb and a standard deviation of 41.4 lb.
Mean = 177
standard deviation = 41.4
We find z-score using given mean and standard deviation
z =![\frac{(x-mean)}{standard deviation}](/tpl/images/0088/3780/c7fe9.png)
=
= -0.265700
Probability (z>-0.26570) = 1 - 0.3974 (use normal distribution table)
= 0.6026
P(weight will be greater than 166 lb) = 0.6026
Ответ: