Suppose a normal distribution has a mean of 16 and a standard deviation of 4. a value of 26 is how many standard deviations away from the mean? −2.5 −1.5 1.5 2.5

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?