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ETC1000 - Business and economic statistics - S1 2025
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Run the following code:
plot(table(df$Year),type="l")
Discuss in one sentence the overall pattern observed in the plot.
What is the probability that the person was female? (Report as a probability to 2 decimal places)
List one R function that can be used to visualise the distribution of the Age variable.
What is the probability that the person was male? (Report as a probability to 2 decimal places)
What is the average age of the people who died in accidents? (Report as an integer)
What is the median age of the people who died in accidents? (Report as an integer)
What does this suggest about the shape of the distribution of ages?
What is the sample size?
You want to test a null hypothesis that the Coefficient of GenderMale equals zero against the alternative that it is less than zero. Perform this test, explaining each step, and explain the practical meaning of the result of your test.