The asteroid 2008 AF4 has one chance in 21,000 of hitting the Earth between the years 2078 and 2100. The asteroid is 390 meters in diameter compared to 250 meters in diameter for Apophis. Assuming that an impact could cause the death of 30,000,000 people the average death rate for this type of event is approximately(A) 3000 people per event.(B) 500 people per event.(C) 1500 people per event.(D) 2000 people per event.(E) 2500 people per event.

C. 1500 people per event

Explanation:

The probability of the asteroid hitting earth is one in 21,000.

Mathematically, that can be represented as .

assuming the impact could cause a death of 30,000,000.

The average death rate for this kind of event if it occurs can be got by multiplying the probability of the event occurring by the death rate.

= × 30,000 = 1,428.57

≈ 1500 people per event. (an approximate answer was required by the question)

This means that, approximately 1500 people will be killed if the event were to occur once.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.