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Q1) Placement exam is provided to 36 randomly chosen college students. Their mean score is 63.6 with standard deviation of 15.1 points. Create a 90% confidence interval for mean score on this placement exam for all students.
a) 23.48 < = mean <= 27.32
b) 2.42 <= mean <=3.98
c) 59.46 < = mean < = 67.74
d) 17.70 < = mean < = 18.90
Using ANOVA, determine if there is a significant difference in the six year graduation rate by type.
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