waterlootemp
33. High and low Temperatures. The University of Waterloo Weather Station tracks the daily low and high temperatures in Waterloo, Ontario, Canada. The table contains a random sample of the daily high and low temperatures in degrees Celsius for 10 days in calendar year 2010. Assume that the temperature differences are normally distributed.
Day | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
---|---|---|---|---|---|---|---|---|---|---|
High | 9.4 | 6.1 | 5.9 | 29.1 | 11.9 | 30.6 | 23.1 | 33.1 | 14.8 | 0.1 |
Low | 0.8 | −8.9 | −1.3 | 19.3 | 6.7 | 21.5 | 10.5 | 18.7 | 7.4 | −9.9 |
10.1.33
Differences: 8.6, 15, 7.2, 9.8, 5.2, 9.1, 12.6, 14.4, 7.4, 10 (a) and (b) (7.6488, 12.211); We are 95% confident that the population mean of the differences between high and low temperatures in May in Waterloo, Ontario, Canada lies between 7.6488 degrees centigrade and 12.211 degrees centigrade.