a) Hint: is standard deviations away from the mean.
b) There is a number such that the interval comprises 50% of the distribution. Determine a in terms of the standard deviation.
Using this information, you can find both answers with a table.
Can anyone help me understand how to do these questions?
I f the number of meals served in a hospital is a normal distribution with amean of 250 and a standard deviation of 37
a) What is the probability that more than 300 meals are served?
B) For the middle 50% of the distribution, what is the range of the number of meals served?
Suffice it to say that the probability density function for the normal distribution is a specific probability density function that describes the normal distribution in particular. If you don't know what that function is, and you don't have a table, then I'm not sure how you're supposed to solve the problem either.
For instance, I have a table in my statistics book that gives me the probability of x being farther than 1.35 standard deviations from the mean in the positive direction, which is the answer to (a).