Question

Find the indicated probability by using the special addition rule. 36) The age distribution of students at a community college is given below 36) Under 21 21-25 26-30 31-35 Over 35 401 420 216 58 24 1119 student from the community college is selected at random. Find the probabity that the student A) 0.052 is between 26 and 35 inclusive. Round approximations to three decimal places B) 0.193 C) 274 D) 0.245 37) A relative frequency distribution is given below for the size of families in one U.S. city 37) 0.396 0.233 0.204 0.040 0.016 A family is selected at random. Find the probabilitythat the size of the family is between 2 and 5 inclusive. Round approximations to three decimal places A) 0.437 B) 0.833 C) 0.507 D) 0.944 Use a table of areas for the standard normal curve to find the required z-score. 38) 38) Determine the two z-scores that divide the area under the standard normal curve into a middle 0.874 area and two outside 0.063 areas. C) -1.45, 1.45 D) -1.53, 1.53 A) -1.46, 1.46 B)-1.39, 1.39 39) Find the z-score for having area 0.09 to its right under the standard normal curve, that is, find 0.09 A) 1.26 B) 1.34 C) 1.39 D) 1.45 40) 40) Find the z-score for which the area under the standard normal curve to its left is 0.04 B)-1.89 C) -1.63 D) -1.75 A)-1.48 41) 41) Determine the two z-scores that divide the area under the standard normal curve into a middle 0.96 area and two outside 0.02 areas. A) 0 and 2.05 B) -2.33 and 2.33 C)-1.75 and 1.75 D) -2.05 and 2.05

Answer 1

21ς + 58 119 245 3ς. P- -0.944 38. D-153, 153 3 9 -2.052OS ,