Question

Hi i have a question

Answer 1

Given the sample table below:

Total number of teenagers that get less than 8 hours of sleep each school night

Sample #1:

The number of teenagers that get less than 8 hours of sleep each night include the sum of teenagers that get less than 4 hours, teenagers that get between 4 and 6 hours, teenagers that get between 6 and 8 hours.

Thus, we have

`2+9+39=50\text{ t}eenagers`

Sample #2:

Thus, we have

`1+12+34=47\text{ te}enagers`

Percentage of teenagers that get between 4 and 10 hours of sleep each school night

ample #1:

The total number of teenagers that get between 4 and 10 hours of sleep is evaluated to be

`9+39+44=92\text{ te}enagers`

Thus, the percentage becomes

`(92)/(100)*100\text{ = 90\%}`

Sample #2:

`12+34+48=94\text{ te}enagers`

`(94)/(100)*100=94\text{ \%}`

Hence, based on the result of the survey,

About half of the teenagers get less than 8 hours of sleep each school night,

More than 90% of teenagers get between 4 and 10 hours of sleep each school night.