Confidence Interval For Mean (Large Sample or Known Population SD)

When sample size greater or equal to 30 or when the Population Standard deviation is known.
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[@mrnjobvu8861]

I have liked your methodology of this topic.Thanks alot sir for your simplicity of the lesson

[@PhilosMasterClass]

@@mrnjobvu8861 Anytime Sir

[@IddrisuAjara]

Please Sample size problem 3,why did we equate the formula to 5.98 and not the 5.22.🤔🤔

[@PhilosMasterClass]

Because, I used a Plus(+) between the point estimate (x bar) and the margin of error, not a minus (-). If it were minus, I would have equated it to the 5.22.

[@nanaefua4744]

Please can you use the other margin of error I mean the negative side to find the zigma over the root n?

[@PhilosMasterClass]

Yes please. But you have to be very careful.

[@janiceosei6424]

Please can I know the formula

[@janiceosei6424]

Is there a formula for find the confidence interval

[@PhilosMasterClass]

There are. And for the condition this video is about, the formula is at the 1:53 minute of the video

[@akwakapaul8750]

Sample size example 1, with the final answer do you run it by one or you run it with whole decimal? 😂 Like 31.2 then you run it to 32

[@PhilosMasterClass]

Sorry, we don’t your question clear. Kindly come clear.

[@BerniceOsei610]

You always have to run your answer up to get a whole number.. that is why he got 32