s1 help needed
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could anyone explain to me how to fill out these blank? How can I find the fre if I only know the width. And what does f x midpt mean? Any reply will be appreciated！
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Original post by 123321123
could anyone explain to me how to fill out these blank? How can I find the fre if I only know the width. And what does f x midpt mean? Any reply will be appreciated！
Posted from TSR Mobile
Attachment not found
could anyone explain to me how to fill out these blank? How can I find the fre if I only know the width. And what does f x midpt mean? Any reply will be appreciated！
Posted from TSR Mobile
f is short for frequency, it is just frequency * midpoint as it says. If in doubt, look up how to find the mean when the data is grouped in classes.
https://www.mathsisfun.com/data/frequency-grouped-mean-median-mode.html
To find frequency for the last one I think you need to use the median (given) to work out what n is and hence..
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