Test: Test (ch1, ch2, ch3) Time Remaining: 01:24:21 Submit Test This Question: 1

Question

Test: Test (ch1, ch2, ch3) Time Remaining: 01:24:21 Submit Test This Question: 1 pt 23of25(22 complete) This Test: 25 pts possible Solar energy is considered by many to be the energy of the future A recent survey was taken to compare the cost of solar energy to the cost of gas or electric energy Results of the survey revealed that the distribution of the amount of the monthly uility bill of a 3-bedroom house using gas or electric anergy had a mean of $92 and a standard deviation of $13. H the distribution oan be oonsiderod bell shaped, what percentage of homes will have a monthly utlity bill of more than $797 P apprornataly 32% uppranimately 16% appronalily 96% uestio Click to select your anser F3 8 0

Explanation / Answer

mean=92

sd=13

P(X>79)

z=x-mean/sd

=79-92/13

=-1

P(Z>-1)

=P(Z<1)

Form standard normal tables,Z<1=0.8413

=0.8413

ANSWER:0.8413

=0.8413*100=84.13%

APPROXIMATELY 84%

OPTIONC

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