Hospital records show that a certain surgical procedure takes on an average 111.6 minutes with a standard deviation of 2.8 minutes. at least what percentage of these surgical procedures take anywhere between 97.6 and 125.6 minutes?

At least 37.74% of the procedures takes between 97.6 and 125.6 minutes

Step-by-step explanation:

The percentage is the area of the standard normal distribution curve between the values 97.6 and 125.6

The standard normal variate of the given data is found as

Thus for the given values Z is calculated as under

Similarly for the other value we have

Thus the area between the calculated values can be found from standard normal distribution table to be 37.74%

after going and makeing graphs i would go with a,

there is nothing that is matches the graph. if there was i would show you. but therefore my answer is a.

hope i

-lavira: )