Bus 308 solutions
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Description
Bus 308
A) By using the Central Limit Theorem with the sample being greater than 30 we can assume that the distribution and shape of x will be normally distributed.
B) Mean 20 (no equations as it was given) 4/ 64 4/8 0.5 Standard Deviation
C) Z (21-20) / (4/ 64) (1/0.5) 2
P .0228
D) Z ( - 20) / (4/ 64) P
A) Z ( - 0.3)/?(0.3(1 - 0.3)/1011)
P (p' ) P (z )
B) If we set the a to anything below the claims can be refuted but on the other hand if we set it above than the claims would be true so the claims can neither be refuted or true .
8.8
A)
N 100 X-bar s % 95 Standard Error ?/?n z score
Width *
Lower Limit ...
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07/28/2014
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