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Essay specific features
Written by:
Sarah C
Date added:
September 11, 2014
Level:
University
Grade:
A
No of pages / words:
4 / 1059
Was viewed:
6409 times
Rating of current essay:
Essay content:
There is no significant difference in the weights of both cities.
Manual
Pooled P-hat = (192 + 97) / (1342 + 720)
= 289 / 2062
= 0.140155
Z-stat = (0.143070 ? 0.134722) ? 0 / sqrt[(0.140155) x (1-0.140155) x (1/1342) x(1/720)]
= 0.008348 / 0.016037
= 0.520546
b)
Confidence Interval = (p1 ? p2) +/- Za/2 * [sqrt ((p1(1-p1)/n1) + p2(1-p2)/n2)]
= (0...
displayed 300 characters
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19 out of the 20 intervals contain the true value of the population proportion calculated in question A, this is close to what we would expect with a 90% confidence level.
Problem 3
a)
One-Sample T: C10 (Women)
Variable
C10
N
137
Mean
129.693
StDev
18.669 SE Mean
1.595
95% CI
(126.539, 132...
displayed 300 characters
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