Answer :
Approximately 2.5% of the values lie above 25.
We first calculate how many standard deviations above the mean 25 is:
Number of standard deviations[tex]= \(\frac{25 - 21}{2} = 2\)[/tex]
Since 25 is 2 standard deviations above the mean, we can use the 68-95-99.7 rule:
- Approximately 95% of the data falls within two standard deviations above and below the mean.
- Therefore, approximately [tex]\(\frac{100 - 95}{2} = 2.5\%\)[/tex] of the data falls above two standard deviations above the mean.
So, approximately 2.5% of the values lie above 25.
