A friend of yours asks 20 people to rate a movie using a 1 to 5 star rating the higher the number of stars, the higher the recommendation Their ratings are listed below a Calculate the variance (s 2 ) and standard deviation (s) of the ratings using either the definitional or the computational formu...

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A friend of yours asks 20 people to rate a movie using a 1- to 5-star rating:

Question:

A friend of yours asks 20 people to rate a movie using a 1- to 5-star rating: the higher the number of stars, the higher the recommendation. Their ratings are listed below: image text in transcribed

a. Calculate the variance (s²) and standard deviation (s) of the ratings using either the definitional or the computational formulas. (Note: From Chapter 3, you may have already calculated the number of scores (N), sum of scores squared ((ΣX)²), the sum of squared scores (ΣX²), and the mean (X̅).)

b. Based on your value of the standard deviation, what would you conclude regarding the degree to which these people agree or disagree about this movie?

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