For a Study Using a T Test for Independent Means

question 46

Multiple Choice

For a study using a t test for independent means, the approximate number of participants needed for 80% power for an estimated small effect size and using a one-tailed test is:

• A)50
• B)64
• C)310
• D)393

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Definitions:

Resistance

The opposition that a substance offers to the flow of electric current, measured in ohms (Ω).

Capacitance

The ability of a system to store an electric charge, measured in farads, represented by the ratio of the change in electric charge to the change in electric potential.

Watts

The measure of power within the International System of Units (SI), defined as one joule per second.

RC Parallel Circuit

An electric circuit in which a resistor and a capacitor are connected parallelly, affecting the impedance and the phase of the voltage and current.