On the average, hotel guests who take elevators weigh about 150 pounds with an sd of about 35 pounds. an engineer is designing a large elevator for a convention hotel, to lift 50 such people. if she designs it to lift 4 tons, the chance it will be overloaded by a random group of 50 people is about . explain briefly.

Probability is only 2.5%

This is arrived based on the central limit theorem that sample mean follows a normal distribution for large samples randomly drawn.

Step-by-step explanation:

Given that on the average, hotel guests who take elevators weigh about 150 pounds with an SD of about 35 pounds.

An engineer is designing a large elevator for a convention hotel, to lift 50 such people.

Maximum capacity = 4 tons =8000 pounds

= 160 pounds/man

If average of 50 people exceeds 160 pounds then it would be overloaded.

Mean of the sample follows a normal with mean = 150 and std error =

Required probability

=

Probability is only 2.5%

This is arrived based on the central limit theorem that sample mean follows a normal distribution for large samples randomly drawn.

answer: a

step-by-step explanation:

if xy ~ yz therefore xy would be the same length as yz

-10i^2-4i

step-by-step explanation:

evaluate for p=2,q=5i

(2−4)(2+5i)i

(2−4)(2+5i)i

=−10i2−4i