In a survey of 50 families, the number of children per family was: 0 children – 6 families, 1 – 14, 2 – 18, 3 – 8, 4 – 4. What is the mean number of children per family?
Competition practiceStatistics
A2
B18
C1.96
D1.8
Step-by-Step Solution
∑fx=0+14+36+24+16=90; mean =5090=1.8. Families with 0 children still count in N.
Answer: D) 1.8
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