A Gasoline Distributor Wonders Whether an Individual's Income Level Influences $\alpha$

question 6

Multiple Choice

A gasoline distributor wonders whether an individual's income level influences the grade of gasoline purchased.The following is a contingency table from a random sample of 300 individuals.
Using $\alpha$ = .05,appropriate decision is ______________.

• A) reject the null hypothesis and conclude the two variables are not independent
• B) reject the null hypothesis and conclude the two variables are independent
• C) do not reject the null hypothesis and conclude the two variables are not independent
• D) do not reject the null hypothesis and conclude the two variables are independent
• E) do nothing

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Definitions:

Depolarization

A decrease in membrane potential that makes the interior of a cell less negative compared to the outside, crucial for nerve impulse transmission.

Voltage-Gated Channel

A type of protein channel in cell membranes that opens or closes in response to changes in electrical membrane potential.

Synaptic Vesicle

Secretory vesicle in the presynaptic terminal containing neurotransmitter substances.

Chemical Synapse

A specialized junction at which a neuron communicates with a target cell across a synaptic cleft using chemical messengers.