A researcher selects a sample from a population with a mean of $\mu$ = 40 and administers a treatment to the individuals in the sample.If the treatment is expected to decrease scores,which of the following is the correct statement of the null hypothesis for a one-tailed test? A)$\mu$ 40 B)$\mu$ 40., D)$\mu$

Question

A researcher selects a sample from a population with a mean of $\mu$ = 40 and administers a treatment to the individuals in the sample.If the treatment is expected to decrease scores,which of the following is the correct statement of the null hypothesis for a one-tailed test? A)$\mu$ > 40 B)$\mu$< 40. C)$\mu$ > 40., D)$\mu$ < 40,

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The Answer of A researcher selects a sample from a population with a mean of $\mu$ = 40 and administers a treatment to the individuals in the sample.If the treatment is expected to decrease scores,which of the following is the correct statement of the null hypothesis for a one-tailed test? A)$\mu$ > 40 B)$\mu$< 40. C)$\mu$ > 40., D)$\mu$ < 40,

A Researcher Selects a Sample from a Population with a Mean