Devise a null and alternative hypothesis,then perform a one-sample z-testusing alpha=0.05 if our class is taller or shorter than the average human in the United States. Graphically display your answer and statistically write up results. In addition, determine the effect size of this relationship and interpret. The average height of adults in the United States is 67.03.8 inches. (Note: this is a population SD) Calculate and interpret the effect size (use Cohen's d)

1. H₀ : _______
2. H_a :_______
3. In words,CLEARLYstate what your random variablerepresents.
4. State the distribution to use for the test.
5. What is the test statistic?
6. What is thep-value? In one or two complete sentences, explain what thep-value means for this problem.
7. Use the previous information to sketch a picture of this situation. CLEARLY, label and scale the horizontal axis and shade the region(s) corresponding to thep-value.
8. Indicate the correct decision ("reject" or "do not reject" the null hypothesis), the reason for it, and write an appropriate conclusion, usingcomplete sentences.
9. Alpha: _______
10. Decision: _______
11. Reason for decision: _______
12. Conclusion: _______
13. Cohen's d = (Msample - population) ) =

DATA:

66

63

66

70

67

68

72

67

68

70

68

66

70

74

62

68

73

68

60

75

60

65

72