Fire load (MJ/m2) is the heat energy that could be released per square meter of floor area by combustion of contents and the str

Answer:

a)

The percentage of fire loads under 600 is 0.765

The percentage of fire loads of at least 1200 is 0.022

b)

The percentage of fire loads in the range of 600 to 1200 is 0.213

Step-by-step explanation:

The cumulative percentages are provided for varying x values.

Value (x)      Cumulative percent

0                   0

150              0.19

300             0.37

450             0.619

600             0.765

750             0.863

900             0.93

1050            0.95

1200            0.978

1350            0.981

1500            0.995

1650           0.996

1800          0.998

1950           1

a)

The percentage of fire loads below 600

P(x<600)=F(600)=0.765

Given the cumulative percentages, the result for 450 illustrates the ratio of fire loads below 600.

The proportion of fire loads of at least 1200

P(X≥1200)=1-F(1200)=1-0.978=0.022

b)

To find the percentage of loads between 600 and 1200

P(600≤X≤1200)=?

P(a≤X≤b)=F(b)-F(a)

P(600≤X≤1200)=F(1200)-F(600)=0.978-0.765=0.213