Question

For a class science experiment, the students had to grow beans in a cup and see how tall they could grow them in two weeks. Their textbook suggested they could grow them to an average of 2 inches tall but the students thought they could grow them higher than that. The 27 students grew their plants to an average height of 2.21 inches with a standard deviation of 0.45 inches. Assume that plant growth follows a normal distribution.

What is the test statistic for the appropriate test of significance?

Question 39 options:

	t = 2.38
	z = 2.38
	z = 2.42
	z = 2.09
	t = 2.42

Answer 1