1. Heights of tall buildings A researcher estimates that the average height of buildings of 30 or more stories in a large city is at least 700 feet high. A random sample of 10 buildings is selected, and the heights in feet are shown. (a) Data: 485, 511, 841, 725, 615, 520, 535, 635, 616, and 582. At alpha=0.05, is there enough evidence to reject the claim? Hypothesis Test statistic or p-value Conclusion Ho: Ha: (b) Find a 95% Confidence Interval for the true height of these buildings. Confidence Interval. Conclusion.