Question 3 Refer to the stack plot below. The vertical scale is the proportion of sales. (a) Describe the proportion of sales for puzzle games between 1985 and 2015. (b) Which genre(s) increased in proportion of sales between 2010 and 2015? (c) Which genre had the largest proportion of sales in 1985? Video Games by Year and Genre: 1980-2016 1.0 0.9 Genre 0.8- Action Advent 0.7 Fighting Misc Platform Puzzle 0.6- 0.5- Racing Role-Pla Shooter Simulatio Sports Strategy 0.4 0.3 0.2 0.1- 0.0- 1980 1985 1990 1995 2000 2005 2010 2015 O True False

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A:

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A: The obtained correlation coefficient is -0.77430159.

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A: Formula used.  Weighted arithmetic mean =∑Xi*wi/∑Wi Please find the explanation below.  

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Q: b) If there are 3.000 plants in the field, approximately how many will be taller than 71 in?

A: Here use basic of normal distribution