1. One mean, sigma unknown2. One mean, sigma known3. Mean differences, using dependent samples(paired data)4.difference of two means using independent samples5.ANOVA

Mohammad wants to study whether global warming is really taking effect in his country. He knows that based on historical data, the average yearly temperature has been 63.2 degrees Fahrenheit with a standard deviation of 7.4 degrees Fahrenheit. He wants to test whether the average has increased this year. Which hypothesis test should he use