Confidence Interval (Statistics) | Mathematics | Page 1

lyric bane Jun 4, 2023, 5:46 PM

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I can't figure out how to do this. Any help would be greatly appreciated.

Screen_Shot_2023-06-04_at_12.44.15_PM.png

gaunt frigate Jun 4, 2023, 5:49 PM

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Did you calculate the percentage

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?

lyric bane Jun 4, 2023, 5:50 PM

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gaunt frigate Did you calculate the percentage

no i dont know how

gaunt frigate Jun 4, 2023, 5:51 PM

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Well the success rate is 281800 / 314000

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Put that into a calculator and tell me what you get

lyric bane Jun 4, 2023, 5:51 PM

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89.75%

gaunt frigate Jun 4, 2023, 5:51 PM

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Ok

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Now I believe the confidence means there is a margin of error for 5%

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So the lower limit would be 0.95(.8975)

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And the higher limit would be 1.05(.8975)

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Just round those to 4 decimal places

lyric bane Jun 4, 2023, 5:53 PM

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i just multiply .95 by .8975?

gaunt frigate Jun 4, 2023, 5:54 PM

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Yes

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I think the confidence means margin of error

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So margin of error is 5%

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That’s lower bound

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Higher

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Is 1 + .05

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= 1.05

lyric bane Jun 4, 2023, 5:55 PM

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it says the answer was incorrect

gaunt frigate Jun 4, 2023, 5:55 PM

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Did u enter both higher and lower

lyric bane Jun 4, 2023, 5:55 PM

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i got 0.8526 and 0.9424

gaunt frigate Jun 4, 2023, 5:56 PM

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Interesting

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Idk then

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Sorry man

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For getting it wrong

lyric bane Jun 4, 2023, 5:57 PM

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np

gaunt frigate Jun 4, 2023, 5:59 PM

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Why

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Do u not learn anything in class?

#Confidence Interval (Statistics)