Exam scores on last year's Data Analysis final were normally distributed, with a mean (µ) of 67 and a standard deviation (o) of 12. If you took a random sample of the 36 students from last year's data analysis class final exam, what is the probability that the mean of their scores was greater than 70?

Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 260 feet and a standard deviation of 50 feet. We randomly sample 49 fly balls.   -Find the 70th percentile of the distribution of the average of 49 fly balls

According to a recent report the battery life for a new line of laptop computers has a mean of 9 hours with a standard deviation of 2.4 hours.  If battery life is normally distributed what percentage of new laptops will last between 8 and 11 hours on a single charge?

The scores on a standardized test are normally distributed with a mean of 120 and standard deviation of 5. What test score is 1.1 standard deviations above the mean?