To Compare the Effect of Weather on Sales of Soft

question 31

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 pa - pb = 0.
ii. The alternate hypothesis is pa - pb > 0.
iii. The z-statistic is 3.40.

• 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:

Maximum Stopping Distance

The longest distance a vehicle can take to come to a complete stop from its highest speed under ideal conditions.

Anti-Compounding Feature

is a safety mechanism in braking systems designed to prevent the simultaneous application of both the service brake and the parking brake, reducing the risk of brake damage or failure.

Trailer Service Brake

The trailer service brake is the main braking system of a trailer, activated by the driver to slow down or stop the trailer while in motion.

Treadle Valve

A dual-circuit service brake actuation valve that meters air from the primary and secondary service reservoirs to the service lines and brake chambers. Also known as a foot valve.