Question
The number of new cars sold by a company in a nancial year can be approximated by a normal distribution with a mean of 125,000
The number of new cars sold by a company in a nancial year can be approximated by a
normal distribution with a mean of 125,000 cars and a standard deviation of 55,000 cars.
1) If the company set a goal of selling more than 100,000 cars per year, calculate the z score.
2) If the company set a goal of selling more than 100,000 cars per year, calculate the
probability the company will not reach the goal.
3) If the company set a goal of selling more than 100,000 cars per year, calculate the
probability the company will reach the goal.
4) Find the number of cars sales that the company has only a 10% chance of achieving next
year.
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