Less than
A normal distribution has a mean of 100 and a standard deviation of 15. What is the percentage below 130?
97.5%
In a normal distribution, the mean is 50 and the standard deviation is 10. What is the probability that a randomly selected value is between 40 and 60?
68%
A normal distribution has a mean of 20 and a standard deviation of 5. What is the probability that a randomly selected value is greater than 30?
2.35%
A normal distribution has a mean of 70 and a standard deviation of 33. What is the percentage below 37?
15.85%
The heights of a group of people are normally distributed with a mean of 170 cm and a standard deviation of 8 cm. What percentage of people have a height between 162 cm and 186 cm?
81.5%
A normal distribution has a mean of 120 and a standard deviation of 50. What is the probability that a randomly selected value is greater than 60?
84%
A normal distribution has a mean of 86 and a standard deviation of 14. What is the percentage below 90?
84%
The Edwards’s Theater chain has studied its movie customers to determine how much money they spend on concessions. The study revealed that the spending distribution is approximately normally distributed with a mean of $4.11 and a standard deviation of $1.37. What percentage of customers will spend less than $3.00 on concessions?
20.9%
A normal distribution has a mean of 88 and a standard deviation of 47. What is the probability that a randomly selected value is greater than 229?
.15