Is there enough evidence to reject the dermatologist’s

Introduction to Hypothesis Testing Table
PSYCH/625 Version 5
1

Introduction to Hypothesis Testing Table

Identify whether each research scenario listed in the left column of the top of the matrix, would be a one- or two-tailed test and then justify your decision. For each research scenario in the bottom of the matrix, write what the null and alternative hypotheses would be.

Research Scenario
One-tail or two-tail test
Justification

A local dermatologist claims that 30% of mole biopsies are unnecessary. Last month at his clinic, 210 out of 634 had benign biopsy results. Is there enough evidence to reject the dermatologist’s claim?

A local dermatologist claims that more than 30% of mole biopsies are unnecessary. Last month at his clinic, 210 out of 634 had benign biopsy results. Is there enough evidence to reject the dermatologist’s claim?

A local dermatologist claims that less than 30% of mole biopsies are unnecessary. Last month at his clinic, 210 out of 634 had benign biopsy results. Is there enough evidence to reject the dermatologist’s claim?

Research Scenario
Null hypothesis:
Alternative hypothesis:

A pharmaceutical company believes their weight loss drug is more effective than any program on the market. They study two groups of people: Group A is given the drug and Group B is given a placebo. They then compare weight loss over the course of 3 months.

A college professor believes class attendance is different on sunny versus cloudy days.

Researchers hypothesize that rats fed donuts for breakfast will perform worse on a task than those fed a high-protein breakfast.

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