To Compare the Effect of Weather on Sales of Soft $\neq$

question 85

Multiple Choice

To compare the effect of weather on sales of soft drinks, a soda manufacturer sampled two regions of the country with the following results. Is there a difference in sales between the 2 regions?
i. The null hypothesis is p_a - p_b = 0.
ii. The alternate hypothesis is p_a - p_b $\neq$ 0.
iii. If $\alpha$ = 0.01 and the z-statistic were calculated to be -1.96, your decision would be to fail to reject.

• A) (i), (ii), and (iii) are all correct statements.
• B) (i) and (ii) are correct statements but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements but not (i).
• E) (ii) is a correct statement but not (i) and (iii).

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Definitions:

Same-Sex Packs

Social groups or gatherings composed of individuals of the same sex, often found in various species for reasons including safety, foraging, or reproductive strategies.

Providing Help

Assistance or support given to someone in need.

Noticing the Situation

The act of becoming aware of or paying attention to something in one's environment, often the first step in deciding how to react.

Interpreting the Situation

The process of understanding and making sense of an event or circumstances, often by analyzing available information and context.