Akbari.farahnaz

2022-01-02

The probability is 0.2 that X is greater than what number?
The probability is 0.05 that X is in the symmet-
ric interval about the mean between which two numbers?
d) The probability is 0.2 that X is greater than what number?
e) The probability is 0.05 that X is in the symmetric interval about the mean between which two numbers?

alenahelenash

Expert2022-02-10Added 556 answers

d) Let K be the required value here.

From standard normal table we get:

Therefore we get the required z-score as

Therefore we get:

Therefore we get:

Therefore

e) Let the

Now due to symmetry about mean as we are given that:

Therefore

Therefore we get:

From standard normal tables we get:

Therefore the required z-score here is

Therefore we have:

Therefore the required

These are the

22+64

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