Question: Devise a null and alternative hypothesis, then perform a t-test using alpha =0.05 if the students in our class that are born in warm weather
Devise a null and alternative hypothesis, then perform a t-test using alpha =0.05 if the students in our class that are born in warm weather months are taller or shorter than those born in cold weather months. Graphically display your answer and statistically write up results. In addition, determine the effect size of this relationship and interpret.
Notes:
Population SDs are unknown.
Assume the northern hemisphere:
Warm months = April, May, June, July, August, September
Cold months = October, November, December, January, February, March
Use Cohen's d effect size:
Cohen's d = (M2- M1) SDpooled) where SDpooled= ((SD12+ SD22) 2)
Warm Month: (Month, Height whole inches)
April, 66
April, 73
April, 66
April, 70
April, 62
June, 68
June, 70
June, 63
July, 68
July, 68
August, 66
September, 66
September, 69
September, 71
Cold Month: (Month, Height whole inches)
October, 72
October, 69
October, 71
November, 75
November, 72
December, 69
January, 60
January, 68
February, 62
February, 72
February, 70
March, 69
March, 69
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