The table shows information about the numbers of hours 30 children spent on their tablets one evening.A) Find the class interval that contains the median.B)Work out an estimate for the mean number of hours

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squashpotato7 squashpotato7 · Answer 1 · 2020-05-22T17:29:51+02:00

Answer:

A- 2<h<3 B- 2.2

Step-by-step explanation:

when you make a dot plot, the median is 11. using that dot plot, you can approximate a mean to be around 2

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sheenuvt12 sheenuvt12 · Answer 2 · 2022-05-16T06:24:58+02:00

The class interval that contains the median. is 2≤ h≤3

The mean number of hours 2.2 h

The arithmetic mean is found by adding the numbers and dividing the sum by the number of numbers in the list.

The median is the middle value in a list ordered from smallest to largest.

a) First find the median,

median= [tex]\frac{30}{2}[/tex] =15

Now, 4+8 =12 <15

again, 4+8+11 =23>15

So, the class interval that contains the median be 2≤ h≤3

b) let us take he middle of the range as the average

=[tex](4 * \frac{(1-0)}{2} +8* \frac{(11+2)}{2} + 11* \frac{(2+3)}{2}+ 7* \frac{(3+4)}{2})[/tex] / 30

= ( 4 x0.5 + 8 x 1.5+ 11 x 2.5 +7x 3.5) /30

= 2.2 h

So, the mean will be 2.2

Learn more about mean and median here:

https://brainly.com/question/2018505

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