A teacher wanted to see if his gifted and talented students

A teacher wanted to see if his gifted and talented students truly performed better than average on a standardized academic test. Use the data from the x_3 cell above to represent the teacher\'s gifted and talented students\' scores on the standardized test. The dependent variable was the number of points earned out of twenty possible. The populational mean (mu) is a score of 7.

Solution

It is 1-tailed test since we want to check whether students performed better than average or not, better means greater than average so it is right tail test