Final answer:
The type of error that could be made in this hypothesis test is a Type 1 error.
Step-by-step explanation:
In this question, we are testing a hypothesis with the null hypothesis H0: mu=12 and the alternative hypothesis Ha: mu≠12. The p-value is given as 0.03 and the significance level (alpha) is 0.05.
Based on the p-value and alpha values, we can see that the p-value is smaller than the alpha, which means we can reject the null hypothesis.
The correct answer is b) Type 1 error as rejecting the null hypothesis when it is actually true would be a Type 1 error.