You have the following information regarding a companies hiring of recent accountants during the last 6 months. and if they are successful on the job:

False negatives = 20 True positives = 40

True negatives = 30 False positives = 10

Use this information to answer the following questions:

What is the base rate for this position?

What is the selection rate (aka, what percentage of people the company has hired during these 6 months)?

What is the decision accuracy for hires (aka, what percentage of hires have been successful)?

Is this accuracy better than what it would be just hiring at random?