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junior college 1 | H2 Maths
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can someone please help me idk why for this qn is not using the sampling distribution formula to calculate z..
Date Posted: 3 years ago
Views: 702
I think you don’t have to use the sampling distribution formula because they are asking for individual savings and not the total savings of 100
ohhh thank you so much
No problem
Normally u only use z test if mean and standard deviation is not given
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Hope this helps :))
Yeah as mentioned in the comments, generally z is only used when either the mean and/or the standard deviation is unknown. Otherwise, it's ok to use the normal method of solving normal distribution :D
Yeah as mentioned in the comments, generally z is only used when either the mean and/or the standard deviation is unknown. Otherwise, it's ok to use the normal method of solving normal distribution :D
Date Posted:
3 years ago
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