When Steve Jobs was CEO of Apple, he earned an annual salary of $1. The CEOs of the 50 largest U.S companies had a mean salary of $1,449,779 and a standard deviation of $527,651 \ \ \ \ A) What is the difference between Jobs salary and the mean CEO salary? \ \ \ \ B) How many standard deviations is that (the difference found in part (a))? \ \ \ \ C) Convert Steve Jobs\\' salary to a z-score \ \ \ \ D) Unusual or usual salary ( z-score from -2 and 2 is considered to be usual)

Step 1:

(a)

The annual salary of steve jobs $1.

The mean salary of the 50 largest U.S companies CEOs is $1,449,779.

The standard deviation is $527,651.

The difference between Jobs salary and mean CEOs salary is = $1,449,779 - $1.

                                                                                                 =$1,449,778.

The difference between Jobs salary and mean CEOs salary is $1,449,778.

Step 2:

(b)

The difference between Jobs salary and mean CEOs salary is $1,449,778.

The standard deviation is $527,651

Mean CEOs salary = $1,449,778 =  ( 2.7476077 ) *  527,651.

So the 2.747 standard deviations is the mean CEOs salary.

Step 3:

(c)

Mean score = $1,449,779    standard deviation = $527,651.

Formula for z - score .

Where ‘x’ is the selected item.

            is the mean.

           is the standard deviation.

The annual salary of steve jobs $1.

z - score for steve jobs salary is :

So the z-score for steve jobs is .

Step 4:

(d)