It's 0.9544 :)

300 is -2 standard deviations from the mean, and 700 is +2 standard deviations from the mean.

So in total, you are 4 standard deviations spread across the normal distribution, or:

P ( -2 < Z < 2), for which I used a probability table to get 0.9544.

Secure Information

Content will be erased after question is completed.

Enter the email address associated with your account, and we will email you a link to reset your password.

Forgot your password?

Sign Up