Multiple choice

The annual precipitation data of a city is normally distributed with mean and standard deviation as 1000 mm and 200 mm, respectively. The probability that the annual precipitation will be more than 1200 mm is

  1. < 50%

  2. 50%

  3. 75%

  4. 100%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a normal distribution, the mean is 1000. 1200 is one standard deviation (200) above the mean. Since the distribution is symmetric, the area above the mean is 50%, and the area above one standard deviation is less than 50%.

Keep practicing — related questions