Casey worked no more than 40 hours each week.
1 answer:
Answer:
Hi, There! my Name is jay and I'm here to help!
<h2>Question</h2>Which graph best represents the number of hours Casey worked each week
<h2>Answer</h2>(Option A . . .)
Step-by-step explanation:
According to the Question it says "Casey worked no more than 40 hours each week"
So we are looking for a graph that goes no more than 40 hours and the best choice would be option A
Hope this helps!
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Answer:
And we can find this probability using the complement rule and the normal standard table or excel:
The firgure attached illustrate the problem
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".
Solution to the problem
Let X the random variable that represent the retirement savings of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And 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:
And we can find this probability using the complement rule and the normal standard table or excel:
The firgure attached illustrate the problem
