The average size of a pair of women's shoes sold at a shoe store is size 8, with a standard deviation of 1.5 sizes. If the sizes are normally distributed, what is the percentile rank of at least a size 9. Go to z-table.com
This answer is true. If there is so much lettuce in the world that it can be had very easily in any venue, then the monetary value of the lettuce is diminished because it is so easily had.