Question
A dependent random sample from two normally distributed populations gives the following results: n = 15 ; average difference =d= 25.4 ; Sd= 2.8 a)
A dependent random sample from two normally distributed populations gives the following results: n = 15 ; average difference =d= 25.4 ; Sd= 2.8
a) Find the 95% confidence interval for the difference between the means of the two populations.
b) Find the margin of error for a 95% confidence interval for the difference between the means of the two populations.
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Cambridge IGCSE And O Level Additional Mathematics
Authors: Val Hanrahan, Jeanette Powell
1st Edition
1510421645, 978-1510421646
