A restaurant decides to to test their oven's thermostat to see if it is working properly, that is, if the actual temperature inside the oven is the same as the temperature to which the thermostat was set. Twenty times, the oven was set at 350 degrees and then the temperature was measured with a thermometer.

Ho: mu = 350 and Ha: mu is not equal to 350

The test statistic is equal to 2.30.

What is the p-value?