72. It is believed that Lake Tahoe Community College (LTCC) Intermediate Algebra students get seven hours of sleep per night, on average. A survey of 22 LTCC Intermediate Algebra students generated a mean of 7.24 hours with a standard deviation of 1.93 hours. At a level of significance of 5 percent, do LTCC Intermediate Algebra students get less than seven hours of sleep per night, on average? The distribution to be used for this test is X- a. N(7.24, 1.93 22 N(7 21 193)