Why The Median Income ( $ ) For People With A Degree?

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Problem
I wonder if the median income ($) for people with a degree qualification taken from the household savings survey is more than the median income ($) for people with a school qualification taken from the households savings survey.
I am going to analyse a sample selected from this population to make an inference as to whether people with a degree have a bigger median income ($) than people with a school qualification. I predict that people with a degree qualification have a higher median income ($) than people with a school qualification because a degree is a higher level education, this means employers will be willing to pay a higher income to employ people with a degree into their workforces.

Plan
I will use the simple random sampling process to select a random sample of 33 people from each group (degree and school qualification) to compare from a total population of 300 people.
To select random subjects from the population, I will use the ran# function on my graphing calculator.
I have decided to use this process because simple random sampling is a relatively basic, easy and inexpensive method method to evaluate the population in a fair, unbiased and representative way.
I chose a sample size of 33 from each group because it was small enough to manage and process the information in the allocated time, but big enough to give a fair indication of what is happening within the population. It will also ensure that each member of the population has an equally likely

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