Since the value of Ho lies inside the (1 - a)-level confidence interval for u, these results are consistent with the hypothesis test failing to reject the null hypothesis. b. According to a national study the average consumer unit spent $1731 on apparel and services in 2012. That same year, 25 consumer units in the Northeast were surveyed about their annual expenditures, in dollars, on apparel and services. the 2% significance level, the data provide sufficient evidence to conclude that the 2012 mean annual expenditure on apparel and services for consumer units in the Northeast differed from the national mean of $1731. (Note: x = $1921.06 and s = $350.32.) The confidence interval is ( (Round to two decimal places as needed.)