A researcher claims that a new nose spray, formula N, is far more effective than that in use today, formula O.The null hypothesis should probably focus on
A) the expected performance of her nose spray, formula N.
B) the performance of today's nose spray, formula O.
C) the actual performance of her nose spray, formula N.
D) the difference between her nose spray, formula N, and the one in use today, formula O.

Question

Quizplus · Accepted Answer

The null hypothesis should focus on the performance of the current nose spray, formula O, as the researcher is making a claim about the superiority of formula N over formula O. The null hypothesis would be that there is no significant difference in effectiveness between formula N and formula O. This provides a baseline for comparison and allows the researcher to test whether formula N actually performs better than formula O.

A Researcher Claims That a New Nose Spray, Formula N