Answer:
Number of families in the sample is 218 families
Step-by-step explanation:
Given:
There are 24 families in the sample that turned on television for 21hours or less.
The 11th percentile of the data is 21hours .
The mean of the data is 36hours.
The standard deviation is 32.2hours.
To calculate number of families in the sample = 24 / 0.11 = 218 families
Answer:
30
Step-by-step explanation:
Let's say x is the number of friends he has
4 · x = 121 - 1
4x = 120
Divide by 4 on each side
x = 30
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