Calculating summary statistics by group using dplyr

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what's the variables RottenTomatoes?

chenalice
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I wonder how to make tibble show more significant digits? Mine only shows 3. Thanks!

joyceqwang
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how do you add 95% CI? thanks for the great/short video

davidw.
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when I do this, I get the error: no applicable method for 'group_by_' applied to an object of class "factor"
any ideas of how to fix this?

saritaupadhyay