Could someone help with #15?
1 answer:
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Answer :
-1/3
Explaination :
K(x) = 3/2x - 1
K(x) = -4
K(-4) = 3 / 2(-4) - 1
K = 3 / -8 - 1
K = 3 / -9
K =
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".
Solution to the problem
Let X the random variable that represent the scores 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 normal standard table or excel and we got:
Answer:
4 ft
Step-by-step explanation:
<h3>Area of rectangle:</h3>Area = 30 square ft
base = 7.5 ft