There are [tex]150[/tex] families in the sample.
Mean of the data [tex]= 33[/tex] hours.
Median of the data [tex]= 29.2[/tex] hours.
[tex]24[/tex] families in the sample turned on the television for [tex]18[/tex] hours or less for the week.
The [tex]16[/tex]th percentile of the data is [tex]18[/tex] hours.
Let [tex]x[/tex] be the number of families in the sample.
So, size of the sample :
[tex]\frac{16}{100} \times x = 24[/tex]
[tex]x=\frac{24 \times 100}{16}[/tex]
[tex]x=150[/tex]
So, there are [tex]150[/tex] families in the sample.
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