Answer:
the answer is "D"
Step-by-step explanation:
Answer:
A;.........9 a.m. - Gary; 12 p.m. - Rachel; 3 p.m. - Christopher; 6 p.m. - Hannah
Step-by-step explanation:
Answer:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Let X the random variable that represent interest on this case, and for this case we know the distribution for X is given by:
And let
represent the sample mean, the distribution for the sample mean is given by:
On this case
Solution to the problem
We want this probability:
The best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
Hey dhsidvxhejfbeifbshdjdbd
Answer:
43.05, meaning a score of 43
Step-by-step explanation: