When helen mirren won the oscar for best actress, she was 61 years old. the oscar-winning best actresses had a mean age of 35.8 years and a standard deviation of 11.3 years. what is the difference between helen mirren's age and the mean age?

a)

b) deviations

c)

d) For this case since we have that z>2 we can consider this value as unusual, since is outside of the interval considered usual.

Step-by-step explanation:

Assuming this complete question : "Helen Mirren was 61 when she earned her Oscar-winning Best Actress award. The Oscar-winning Best Actresses have a mean age of 35.8 years and a standard deviation of 11.3 years"

a) What is the difference between Helen Mirren’s age and the mean age?

For this case we can do this:

b) How many standard deviations is that?

We just need to take the difference and divide by the deviation and we got:

deviations

c) Convert Helen Mirren’s age to a z score.

The z score is defined as:

And if we replace the values given we got:

d) If we consider “usual” ages to be those that convert to z scores between –2 and 2, is Helen Mirren’s age usual or unusual?

For this case since we have that z>2 we can consider this value as unusual, since is outside of the interval considered usual.

-60.75

step-by-step explanation:

just add the numbers then put the negative sign on it