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:

Lysosomes

Lysosomes are membrane-bound organelles found in animal cells responsible for breaking down waste materials and cellular debris through enzymes.

Proteins

Proteins are large, complex molecules essential for the structure, function, and regulation of the body's tissues and organs, composed of chains of amino acids.

Schwann Cells

A type of glial cell in the peripheral nervous system that encircles nerve fibers, providing insulation (myelination) and enhancing signal transmission.

Oligodendroglia

Glial cells in the central nervous system that produce myelin, a substance that insulates axons to increase the speed at which neural impulses propagate.