Aresearcher is conducting an experiment to evaluate a treatment that is expected to increase the scores for individuals in a population that is known to have a mean of μ = 80. the results will be examined using a one-tailed hypothesis test. which of the following is the correct statement of the null hypothesis?
a. μ> 80
b. μ=> 80
c. μ< 80
d. μ< =80

d. μ<=80

Step-by-step explanation:

Null hypothesis is statement written about the population parameter with respect to the objective of the test and against to the alternative hypothesis.

It always contains = , ≤ , ≥ signs.

Given : A researcher is conducting an experiment to evaluate a treatment that is expected to increase the scores for individuals in a population that is known to have a mean of μ = 80.

The results will be examined using a one-tailed hypothesis test.

Alternative hypothesis must be :

Then, null hypothesis will be :  [opposite to the alternative hypothesis.]

Hence, the correct answer is . d. μ<=80

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

step-by-step explanation: