A coffee company wants to make sure that their coffee is being served at the right temperature. If it is too hot, the customers could burn themselves. If it is too cold, the customers will be unsatisfied. The company has determined that they want the average coffee temperature to be 65 degrees C. They take a sample of 20 orders of coffee and find the sample mean to be equal to 70.2 C.

What does mu represent for this problem?

The average temperature of coffee in the population, which is unknown.

The average temperature of coffee in the population, which is 70.2.

The average temperature of coffee in the sample, which is unknown.

The average temperature of coffee in the sample, which is 70.2.