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14 Dec 2021
Given information
It is believed that the average grade on an English essay in a particular school system for females is higher than for males. A random sample of females had a mean score of with a standard deviation of three, and a random sample of males had a mean score of with a standard deviation of four.
Step-by-step explanation
Step 1.
Let the average grade for females in the English essay be and that of males be , then
The null and alternative hypotheses can be stated as follows:
,
.
Hence, this hypothesis test is for independent group means, population standard deviations, and/or variances unknown.
Option.
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