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Fig. 3.4 Result of Using the TINV Function to Find the Confidence Interval About the Mean
3.2 Hypothesis testing
One of the important activities of research scientists is that they attempt to “check”
their assumptions about the world by testing these assumptions in the form of
hypotheses.
A typical hypothesis is in the form : “If x , then y.”
Some examples would be:
1. “If we use this new method fertilizing the soil, the corn yield of the plot will
increase by 3 percent.”
2. “If we use this new method of teaching science to ninth graders, then our science
achievement scores will go up by 5 percent.”
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