Question

Invalid: SELECT fname, fname, count (*) "Disease Count" FROM patient p, patient_disease pd WHERE p.patient_id= pd.patient_id GROUP BY fname HAVING Disease Count > 1?

Answer 1

The student's solution in statistics utilizes hypothesis testing, with a decision to reject the null hypothesis based on a p-value lower than the established alpha level of 0.05, indicating sufficient evidence at the 5 percent level of significance.

Step-by-step explanation:

When checking a student's solution involving hypothesis testing, particular attention must be paid to the methodology, including the significance level (alpha), the decision regarding the null hypothesis, and the rationale behind this decision, typically based on a comparison of the p-value against the pre-established alpha.

In the provided solution, the student has an alpha of 0.05, and based on their findings, they decide to reject the null hypothesis because the p-value is less than alpha. The conclusion they draw from these results—that there is sufficient evidence at the 5 percent level of significance to support the claim that the distribution of surveyed patients with the disease deviates from the expected distribution—is contingent upon this decision-making process.