The number of standard deviations z that a particular value of r is from the mean can be computed as .Suppose that you work as a commission-only insurance agent earning $1,000 per week on average. Suppose that your standard deviation of weekly earnings is $500. What is the probability that you zero in a week? Use the following brief z-table to help with this problem.
A) 1.3% chance of earning nothing in a week
B) 2.28% chance of earning nothing in a week
C) 15.87% chance of earning nothing in a week
D) 50% chance of earning nothing in a week
E) none of the above

Question

The number of standard deviations z that a particular value of r is from the mean  can be computed as  .Suppose that you work as a commission-only insurance agent earning $1,000 per week on average. Suppose that your standard deviation of weekly earnings is $500. What is the probability that you zero in a week? Use the following brief z-table to help with this problem. 
A) 1.3% chance of earning nothing in a week 
B) 2.28% chance of earning nothing in a week 
C) 15.87% chance of earning nothing in a week 
D) 50% chance of earning nothing in a week 
E) none of the above

Quizplus · Accepted Answer

The Answer is B

The Number of Standard Deviations Z That a Particular Value