In a Sandwich Shop, the Following Probability Distribution Was Obtained

question 14

Multiple Choice

In a sandwich shop, the following probability distribution was obtained. The random variable x represents thenumber of condiments used for a hamburger. Find the mean and standard deviation for the random variable x. $$\begin{array} { c | c } \mathrm { x } & \mathrm { P } ( \mathrm { x } ) \\\hline 0 & 0.30 \\1 & 0.40 \\2 & 0.20 \\3 & 0.06 \\4 & 0.04\end{array}$$

• A) mean: 1.14; standard deviation: 1.04
• B) mean: 1.54; standard deviation: 1.30
• C) mean: 1.30; standard deviation: 2.38
• D) mean: 1.30; standard deviation: 1.54

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Definitions:

Subliminal Stimuli

Stimuli that are below the threshold of conscious perception but can influence thoughts, feelings, or actions.

Conscious Awareness

The state of being aware of and able to think about one's own existence, sensations, thoughts, surroundings, and experiences.

Subliminal Perception

The processing of information by the brain that occurs below the level of conscious awareness.

Absolute Threshold

The minimum intensity of stimulation that must occur before you experience a sensation.