Answer: 8.3
Step-by-step explanation:
To find the variance, you want to find the mean of the data.
Now that we have the mean, we find the difference between each data point and the mean.
3-5=-2
3-5=-2
8-5=3
1-5=-4
9-5=4
6-5=1
With the difference, you square each and find the average.
(-2)²=4
(-2)²=4
3²=9
(-4)²=16
4²=16
1²=1
The variance is 8.3.
<u><em>Answer:</em></u>
She stayed awake for 295 minutes today
<u><em>Explanation:</em></u>
<u>We are given that:</u>
Yesterday, she drank one cup
Today, she drank of a cup more than yesterday
<u>This means that:</u>
Number of cups she drank today =
Now, we know that she drinks of a cup per hour any time she is not sleeping
We use cross multiplication to get the time she took to drink cups
1 hour ...........................> of a cup
?? hours ......................> cups
Time taken =
This means that she was awake for hours
<u>Finally, we convert this to minutes:</u>
Knowing that 1 hour has 60 minutes, therefore:
She stayed awake for minutes
Hope this helps :)