The following data consist of IQ scores for 50 participants

141 97 107 127 108 87 124 110 114 92

115 118 101 112 102 91 146 129 114 102

96 108 109 139 134 92 106 83 109 104

118 135 127 102 101 98 97 116 113 131

101 108 113 106 86 107 129 105 89 123

Range - 146 - 83 = 63

Grouped Frequency Distribution Table

x	f
140 - 149	2
130 - 139	4
120 - 129	6
110 - 119	10
100 - 109	17
90 - 99	7
80 - 89	4

Questions:

QUESTION 2 - Real Limits and Interpolation.

1. Using the real limits, what is the percentile rank for X = 99.5? for 109.5?

2. Using the real limits, what score is associated with the 76^th percentile? The 88^th percentile?

3. Using interpolation, find the score associated with the 25^th percentile.

4. Using interpolation, find the percentile rank for X = 115.