A researcher wishes to test H₀: $\mu$ = 20 versus H_a: $\mu$

Question

A researcher wishes to test H₀:

\mu

= 20 versus H_a:

\mu

< 20.A sample of size n = 16 from a normally distributed population produces a sample mean of

\bar { x }

= 16.The population standard deviation is

\sigma

= 3) Compute Cohen's d.

Quizplus · Accepted Answer

Cohen's d is calculated as the difference between the sample mean and the population mean divided by the population standard deviation: $d = \frac{\bar{x} - \mu}{\sigma} = \frac{16 - 20}{3} = -\frac{4}{3} = -1.33$. The absolute value is taken for effect size, making it 1.33.

A Researcher Wishes to Test H0 μ\muμ = 20 Versus Ha μ\muμ

A Researcher Wishes to Test H₀ $\mu$ = 20 Versus H_a $\mu$