Following is the data regarding the IQ of 30 children of a school.
106 118 112 120 103 105 99 139 65 113 108 116 93 100 120 100 108 100 112 110 109 117 98 103 99 110 95 101 105 98
Prepare a frequency distribution with class intervals: less than or
equal to 90, 90-110, 110-120, more than or equal to 120.
Answers
Answer:
90-110
Step-by-step explanation:
If you check then most of the answers are from 90-110, so therefore I recommend to give that as your answer..
Good Luck!!
Complete question
Following is the data regarding the IQ of 30 children of a school.
106 118 112 120 103 105 99 139 65 113 108 116 93 100 120 100 108 100 112 110 109 117 98 103 99 110 95 101 105 98
Prepare a frequency distribution with class intervals: less than 90, 90-110, 110-120, more than or equal to 120.
Answer:
Step-by-step explanation:
Given,
The IQ of 30 children of a school are 106 118 112 120 103 105 99 139 65 113 108 116 93 100 120 100 108 100 112 110 109 117 98 103 99 110 95 101 105 98
To find,
The frequency distribution with the class intervals: less than 90, 90-110, 110-120, more than or equal to 120.
Solution:
The IQ levels of the children in the class less than 90 are(IQ<90) -- 65
Hence the number of children in the class interval (<90) = 1
The IQ levels of the children in class 90-110(90≤IQ<110)
106,103, 105, 99,108, 93,100,100,108, 100,109,98, 103, 99,95, 101, 105 98
Hence the number of children in the class interval(90≤IQ<110) = 18
The IQ levels of the children in class 110-120(110≤IQ<120)
118, 112,113,116,112, 110,117,110
Hence the number of children in the class interval(110≤IQ<120) = 8
The IQ levels of the children in class 110-120(120≤IQ)
120, 139, 120
Hence the number of children in the class interval(120≤IQ) = 3
Hence the frequency distribution is
Class interval Frequency(f)
<90 1
90 - 110 18
110 - 120 8
≥120 3
-----------------------
Σf = 30
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