Find the following probabilities for the standard normal random variable z:
How do I go about figuring these out? I'm so confused and my professor isn't much help.
- AlanLv 72 months agoFavorite Answer
since you figured out the last two.
P( A<z<B) = P(z<B) - P(z<A)
so this becomes
P(−1.68≤z≤2.23)= P(z< 2.23) - P(z< -1.68)
so you now just need to find
P(z< 2.23) and P(z< -1.68)
P(−0.97≤z≤2.01) = P(z< 2.01) - P(z< -0.97)
again you should know how to find
P(z<2.01) and P(z< -0.97)
- 2 months ago
I'm sending you the answer for the first one, you need to add the probabilities seen in the attached picture i.e. 45.35% + 48.71% = 94.06%
- alexLv 72 months ago
Just know how to input data in your calculator
- MaryLv 42 months ago
you need to look at a z-score table. find the values in the table and you will have your answers.