Data Driven A

Calculator

Sample Number	Ounces in Bag				Minimum	19.02
1	20.56				Maximum	20.79
2	19.37				Q 1	19.66
3	20.01				Q 2	19.925
4	19.99				Q 3	20.1725
5	19.65
6	19.94
7	19.47
8	20.19
9	19.72
10	19.51
11	19.52
12	19.99
13	20.28
14	19.02				Student should Use t-test
15	20.79				Mean	19.92
16	19.47				Median	19.9250
17	20.67				Standard Deviation	0.402598
18	19.69				n=	30
19	20.12				df=	29
20	20.29				Confidence Level=	0.95
21	19.92				t=	2.045
22	19.79				E=	0.150333
23	19.72				Confidence Interval Lower Limit	19.76767
24	19.92				Confidence Interval Upper Limit	20.0683
25	20.39				Null Hypothesis	µ=20
26	19.49				Alternative Hypothesis	µ<20
27	19.92				What type of Test Statistic did you use and why?	t-test; population standard deviation not given
28	19.93
29	19.98
30	20.23
					Conclusion: Is the claim supported? Why or why not?	Fail to reject the null so there is not enough evidence to reject the hypothesis; we cannot support this claim.
					If student uses z-test; provide feedback and grade for content.
				Hypothesis Test
				Null Hyp:	m	=	20	← In cell C18, select the correct equality/inequality, enter null value in D18
=				Alt Hyp:	m	<	20	← In cell C19, select the correct inequality, enter same null value in D19
≥
≤					significance level =	0.05	← Enter the level of significance of the test.
≠					test statistic =	-1.11558
<					critical value =	-1.69913
>					p-value =	0.13688
				Since	0.1368797045	>	0.05	we	fail to reject	the null:	m	=	20