Toronto, Montreal and Vancouver accounted for 30% of Canadian retail sales in a recent year. You interview a random sample of Canadian residents this year to see whether that proportion has changed. Suppose that all assumptions are met and you test the hypothesis Hop = 0.3 vs. HA p 0.3. A sample of size 500 results in a sample proportion of 0.25. 1. What is the standard deviation of the sample proportion? 2. Compute the value of the z-statistic. 3. Find the p-value associated with this z statistic. 4. State your conclusion at a = 0.05

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