A sample of 100 IQ scores produced the following statistics: mean = 100 lower quartile = 70 median = 95 upper quartile = 120 mode = 75 standard deviation = 30 Which statement(s) is (are) correct? (1)...

A sample of 100 IQ scores produced the following statistics:

mean = 100 lower quartile = 70

median = 95 upper quartile = 120

mode = 75 standard deviation = 30

Which statement(s) is (are) correct?

(1) Half of the scores are less than 100.

(2) The middle 50% of scores are between 70 and 120.

(3) One-quarter of the scores are greater than 100.

(4) The most common score is 95.