Question

Using the 95% confidence level and the 10th grade writing scores in the Class Data file, you would expect the lower end of the confidence interval to be approximately what value?"

Answer 1

Writing scores
84
80
90
90
98
94
91
86
90
91
90
91
91
94
91
90
81
84
91
92
91
91
98
94
91
85
91
90.000	mean Writing scores
4.315	std. dev.
0.830	std. error
27	n
26	df
88.29	confidence interval 95.% lower
91.71	confidence interval 95.% upper
1.707	margin of error

The lower end of the confidence interval = 88.29