1. The daily temperature in August in a region is normallydistributed with a mean of 86 degrees F and a standard deviation of4 degrees F. What is the probability (4 significant figures) that adaily temperature would be 72 degrees F or less? Would this beconsidered unusual, or not unusual?
2. The daily temperature in August in a region is normallydistributed with a mean of 86 degrees F and a standard deviation of4 degrees F. What is the probability that a daily temperature wouldbe between 90 and 100 degrees F? Would such temperatures beconsidered unusual, or not unusual?
3. The daily temperature in August in a region is normallydistributed with a mean of 86 degrees F and a standard deviation of4 degrees F. What is the 90th percentile for all such dailytemperatures? Round to the nearest hundredth of a degree; don'tforget units of measure
4. The daily temperature in August in a region is normallydistributed with a mean of 86 degrees F and a standard deviation of4 degrees F. What is the centered, symmetric interval containing80% of all such temperatures? (round to the nearest hundredth of adegree); don't forget units of measure
