11 12 13 14 15 16 17 18 19 20 time remaining 01:26:14 fiona wrote out the description of each step for her multiplication of the
1 answer:
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Answer:
1. Let n represents the number of weeks she needs to make at least 28 costumes,
Since, she can make 4 costumes each week,
i.e. In number line closed circle on 7 and shaded right from 7.
2. If the maximum time taken by her is 10 weeks,
⇒ n ≤ 10 ----(2),
From equation (1) and (2),
I.e. closed circle on both 7 and 10 and shaded right from 7 and shaded left from 10.
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: