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Learning Module 3
RUBEN O. MAGOS, MPRM-B July 15, 2018
Classroom Exercise
1. Problem Statement
Is there a significant difference between the two brands of
photocopying machines’ mean repair time?
2. Hypotheses
Ho: There is no significant difference between the two brands of
photocopying machines’ mean repair time.
Ha: There is a significant difference between the two brands of photocopying
machines’ mean repair time.
3. Choice of test statistic and :α:
T–test of two independent samples, =0.05.α =0.05.
4. Computation
T – Value = - 2.12
P – Value = 0.036
5. Decision Rule & Finding
Decision Rule: Reject Ho if level of significance (α) > p-value ) > p-valueα =0.05.
Finding: (α) > p-value0.05) > p-value (α) > p-value0.036) α =0.05.
6. Decision
Reject the null (α) > p-valueHo) hypothesis
7. Interpretation and Analysis
There is a significant difference between mean repair time of the two
brands of photocopying machines. Brand A outperformed Brand B as can be
