The following table shows the age distribution of a sample of 180 students at a local college.
a.Of the students in the sample,what percentage is younger than 20 years of age?
b.What percentage is at least 30 years of age?
c.Based on this sample,what percentage of the students at the college do you estimate to be younger than 25 years of age?
Definitions:
Test Statistic T
A type of statistic used in hypothesis testing, specifically in the context of t-tests, to determine if there is a significant difference between two groups.
Normally Distributed
Describes a distribution that is symmetric around the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.
Sample Sizes
Sample sizes refer to the number of observations or units chosen from a population for the purpose of statistical analysis.
Normal Approximation
Normal approximation is a statistical technique that involves using the normal distribution to approximate the distribution of sample means or sums, especially useful for large sample sizes.
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