In a survey of a group of men, the heights in the 20-29 age group were normally distributed, with a mean of 66.3 inches and a standard deviation of 4.0 inches. A study participant is randomly selected. Complete parts (a) through (d) below (a) Find the probability that a study participant has a height that is less than 68 inches The probability that the study participant selected at random is less than 68 inches tall is _____

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