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Show means to prove right?
This this correct? P(Z<500-510/s.d.)= 0.01
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 Aug 6 2013, 09:44 PM
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#1
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Senior Member
5,648 posts Joined: Mar 2011 From: Jalan Tijani 
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Thanks to maximR for showing me this thread.
I got question. Show means to prove right? This this correct? P(Z<500-510/s.d.)= 0.01 |
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Aug 7 2013, 07:52 AM
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#2
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Senior Member
5,648 posts Joined: Mar 2011 From: Jalan Tijani
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QUOTE(ystiang @ Aug 6 2013, 10:11 PM) Usually I will suggest continuity correction... But when does the 4.3g come into play? P(X < 500) = 0.01 P(Z < (499.5-510)/S.D.) = 0.01 Show basically means prove. Don't forget [shown].   |
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Aug 7 2013, 07:27 PM
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#3
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Senior Member
5,648 posts Joined: Mar 2011 From: Jalan Tijani
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QUOTE(ystiang @ Aug 7 2013, 11:13 AM) Since P(Z < z) = 0.01 I see. Thanks for the heads up Since the probability is less than 0.5, z must be negative. P(Z < -z) = 1 - 0.01 = 0.99 From the normal distribution table, P(Z < 2.326) = 0.99 Thus, P(Z < -2.326) = 0.01 (500-510)/SD = -2.326 -10/SD = -2.326 SD = -10/-2.326 = 4.3g [shown] I use back 500 because I think continuity correction isn't in SPM level.  |
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