Consider this conclusion based on a study of shoppers\' preferences: \"In a rece

Question

Consider this conclusion based on a study of shoppers' preferences: "In a recent survey, 117 out of 180 consumers reported that they preferred plastic bags instead of paper bags for their groceries. If preference for paper versus plastic is split 50/50 in the population, the chance of such extreme results in a sample of this size is about 0.0001. Because this is less than 0.10, we can conclude that there is a statistically significant difference in preference." Give a numerical value for each of the following.
(a) The p-value.
____________

(b) The level of significance, a.
____________

(c) The sample proportion. Round your answer to 2 decimal places
____________

(d) The sample size.
____________

(e) The null value.
____________

Explanation / Answer

(a) the p-value is about 0.0001 (b) the level of significance is 0.10 (c) The sample proportion is 117/180 = 0.65. (d) The sample size is 180. (e) The null value is 0.5.

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