To Compare the Effect of Weather on Sales of Soft

question 19

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 alternate hypothesis is pa - pb ≠ 0.
ii. Using the 1% level of significance, the critical value is ±2.58.
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:

X and Y

Typically used to represent independent and dependent variables in a mathematical function or data set, respectively.

Marginal Probability

is the probability of an event occurring without considering other related events.

Coefficient of Correlation

The coefficient of correlation, also known as Pearson's r, measures the strength and direction of a linear relationship between two quantitative variables.

Marginal Probability

The probability of an event occurring in a probability distribution, regardless of the outcome of other variables.