Chapter 7: Q. 27 (page 429)
For the sums of distribution to approach a normal distribution, what must be true?
The sample size is used to know the number of individuals who play an active role in statistical terms.
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Complete the distributions.
a. _____(_____,_____)
b. role="math" localid="1648618952256" _____(_____,_____)
Find the probability that the sum of the values falls between the numbers you found in and.
Find the probability that the sum of the values is less than .
7.7 The mean number of minutes for app engagement by a table use is minutes. Suppose the standard deviation is one minute. Take a sample size of .
a. What is the probability that the sum of the sample is between seven hours and ten hours? What does this mean in context of the problem?
b. Find the and percentiles for the sum of the sample. Interpret these values in context.
What is the mean of ฮฃX?
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