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Chapter 7: Q. 29 (page 429)
An unknown distribution has a mean of 25 and a standard deviation of six. Let X = one object from this distribution. What is the sample size if the standard deviation of ΣX is 42?
The sample size is used to calculate the number of individuals in a particular area in statistical terms.
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An unknown distribution has a mean of 19 and a standard deviation of 20. Let X = the object of interest. What is the sample size if the mean of ΣX is 15,200?
Find the probability that the sample mean is between seven and 11
In order for the sums of distribution to approach a normal distribution, what must be true?
Based on data from the National Health Survey, women between the ages of and have an average systolic blood pressures (in mm Hg) of with a standard deviation of Systolic blood pressure for women between the ages of to follow a normal distribution.
a. If one woman from this population is randomly selected, find the probability that her systolic blood pressure is greater than .
b. If women from this population are randomly selected, find the probability that their mean systolic blood pressure is greater than .
c. If the sample were four women between the ages of to and we did not know the original distribution, could the central limit theorem be used?
What's the approximate probability that the average price forgas stations is over localid="1648486706621" ?
a. almost zero
b.
c.
d. unknown
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