When Testing for the Difference Between the Means of Two

question 34

Multiple Choice

When testing for the difference between the means of two normal populations using two independent samples with equal variances and with sizes of n_x = 20 and n_y = 15,what is the number of degrees of freedom for the t test statistic?

• A)35
• B)33
• C)18
• D)13

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Definitions:

Sound's Frequency

The number of vibrations or cycles per second of a sound wave, which determines the pitch of the sound.

High-Frequency

Refers to electromagnetic waves with very short wavelengths and high rates of oscillation or vibration.

Low-Frequency

Describing events or phenomena that occur at relatively low rates or cycles per unit of time, often in the context of sound waves or electronic signals.

Higher-Frequency

Refers to waves or events that occur at an increased rate per unit time, often associated with higher energy levels in the context of electromagnetic spectrums.