An elevator can hold a maximum of 800 pounds. If a luggage rack weighs 50
pounds and the average person weighs
150 pounds, how many people can
safely fit in the elevator?

5 people + 1 luggage rack

Step-by-step explanation:

150*5=750

750+50=800

5

Step-by-step explanation:

800/150=5.33

Rounded this is 5

(a)

(b) The best  point estimate of is the sample mean

The margin of error =  4.552

Step-by-step explanation:

Given : The confidence interval for the population mean =  (13.046 , 22.15)

Sample mean :

Standard deviation :

Sample size :

a. Let represents the population mean.

Then we can write the confidence interval for the population mean as :-

b. The best  point estimate of is the sample mean

Also, the lower limit of confidence interval can be written as

i.e.

Hence, the margin of error =  4.552