Question

n = 36	H0: μ ≤ 20
	= 24.6	Ha: μ > 20
	σ = 12

Thirty six GGC students were sampled to determine their average age. The GGC website indicates that the average age of students was 20 years old, and you decided to conduct an upper tail test because you think the average age is higher. You collected the above information. What is the value of your test statistic?

Question 2 options:

	-2.3
	-0.38
	0.38
	2.3

Answer 1

Solution :

= 20

= 24.6

= 12

n = 36

This is the right tailed test .

The null and alternative hypothesis is

H0 :   ≤ 20

Ha : > 20

Test statistic = z

= ( - ) / / n

= (24.6-20) /12 / 36

= 2.3

Answer = 2.3