Question

For 300 trading​ days, the daily closing price of a stock​ (in $) is well modeled by a Normal model with mean ​$195.89 and standard deviation ​$7.18. According to this​ model, what is the probability that on a randomly selected day in this period the stock price closed as follows. ​a) above ​$210.25​? ​b) below ​$203.07​? ​c) between ​$181.53 and ​$210.25​? ​d) Which would be more​ unusual, a day on which the stock price closed above ​$208 or below ​$180​?

Answer 1

part a) graph

part b) graph

part c) graph

part d)