(V - W)T = a Use the Distributive Property
VT - WT = a Add WT to both sides
VT = a + WT Divide both sides by T
V =
Cancel out the 
V =
+ W
VT - WT = a Add WT to both sides
VT = a + WT Divide both sides by T
V =
V =
✨ BRAINLIEST✨ to first correct answer
2 answers:
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Answer:
a)
b)
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:
(a) What are the mean and standard deviation of the sampling distribution?
On this case
(b) What is the approximate probability that x will be within 0.4 of the population mean μ? (Round your answer to four decimal places.) P =
So for this case we want this probability:
And for this case we can use the z score given by this formula:
And using this concept we got this: