As an experiment to understand measurement error, a statistics professor asks four students to measure the height of the professor, a male student, and a female student. The differences (in centimeters) between the correct dimension and the ones produced by the students are listed here. Can we infer that there are differences in the errors between the subjects being measured? (Use α =.05.)

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Errors in Measuring Heights of Student Professor Male Student Female Student 1.4 3.1 2.8 3.4 1.5 2.6 2.1 3.6 1.3 2.4 1.5 2.9 3 4