a) Average talk time between charges of a cell phone isadvertised as 4.6 hours. Assume that talk time is normallydistributed with a standard deviation of 0.6 hours.
Find the probability that talk time between charges for arandomly selected cell phone is either more than 5.7 hours or below2.8 hours. (If you use the z table, round the \"z\" value to2 decimal places. Round your final answer to 4 decimal places. DoNOT express as a percentage.)
b) Average talk time between charges of a cell phone isadvertised as 4.6 hours. Assume that talk time is normallydistributed with a standard deviation of 0.6 hours.
Twenty-nine percent of the time, talk time between charges isbelow a particular value. What is this value? (Round \"z\"value to 2 decimal places and final answer to 2 decimalplaces.)
c) Average talk time between charges of a cell phone isadvertised as 4.6 hours. Assume that talk time is normallydistributed with a standard deviation of 0.6 hours.
Find the probability that talk time between charges for arandomly selected cell phone is below 3.7 hours. (If youuse the z table, round  \"z\" value to 2 decimal places.Round your final answer to 4 decimal places. Do NOT express as apercentage.)
