Question

The mean of 10 items was 50. The value of largest item was 65. It was later found that it is
actually 60. Therefore the correct mean is

Answer 1

Answer:

Step-by-step explanation:

Note that the mean μ of the distribution is 72 years and the standard deviation σ is 6 years.

We know that the probability P(X > 75) is equal to 1 – P(X ≤ 75), so we can use a table to find P(X ≤ 75). ...

P(Z ≤ 0.5) = 0.6915.

Now we can calculate P(X > 75).

P(X > 75) = 1 – P(X ≤ 75) = 1 – P(Z ≤ 0.5) = 1 – 0.6915 = 0.3085.

Answer 2

ask the question clearly

provide all of the value