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ZAFEMARYJANEIN
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6. compute the interval of N
given the confidence level,
Sample mean population standard
deviation o, and samle size n.
confidence level=90%,x=42,ō=10 and n=40​

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BEATRIZALEJOIN

at_explanation_text_math

How to Find a Sample Size Given a Confidence Interval and Width (unknown population standard deviation)

za/2: Divide the confidence interval by two, and look that area up in the z-table: .95 / 2 = 0.475. ...

E (margin of error): Divide the given width by 2. 6% / 2. ...

: use the given percentage. 41% = 0.41. ...

: subtract. from 1.

its not the answer

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