Question

The discrete probability distribution of X is shown below, where X represents the number of earthquakes in the U.S. that are 7.5 (Richter Scale) or higher in a given year. X= Number of Earthquakes 0 1 P(x) 0.5 0 .4 | 0.1 2 14. Referring to Problem C, the probability that there will be no earthquakes in the U.S.is a) 0.1 b) 0.6 c) 1.0 d) 0.5 15. Referring to Problem C, the probability of at least 2 earthquakes is a) 0.44 b) 0.66 c) 1.0 d) 0.1 16. Referring to Problem C, how many earthquakes should we expect in the U.S. on average? a) 0.6 b) 1.0 c) 0.44 d) 0.1 17. Referring to Problem C, the variance for the number of earthquakes is a) 1.0 b) 0.1 c) 0.44 d) 0.66

Answer 1

Ans 14)

With reference to the table, the probability that there will be no earthquakes in the US is 0.5

OPTION D is correct

Ans 15)

The probability of at least 2 earthquakes meaning 2 or more earthquakes is 0.1

OPTION D is correct