1. Dispersion measures cannot be used to describe nominal data.

True

False

2. Compared with the Mean value, the median is a more robust and accurate measure to summarize wages of staff at a factory below:

True

False

3. Two-sample t test requires that the two samples are independent of each other.

True

False

4. The manager of a grocery store intends to distribute 10% discount coupons to boost sales, yet recent studies suggest that such coupons only catalyze sales when the average customer expenditure is greater than $35.00. Historical sales data of the store reveals that the average spending per customer is $35.18.

Suppose the test used by the manager is correct, and the test results show that p = 0.14 (significance level = 5%). Based on the reported results, please indicate which of the following statements is RIGHT.

		Based on the results, the manager should NOT distribute the coupon.
		The analysis used by the manager could be the chi-square analysis.
		The test conducted by the manager should be a two-sample t-test.
		Based on the results, the manager should distribute the coupon.