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hector recorded the amount of rainfall in the desert each month over a period of two years. the list shows the number of inches fell for each month for year 1 and year 2 year 1: 2,2,0,0,0,1,2,2,3,2,2,2year 2:1,1,0,0,0,0,2,2,2,1,2,1 whats the difference in rain fall between the mean of the rain fall in two years hurry its a test

Respuesta :

ANSWER

The difference is 0.5

EXPLANATION

We have to find the mean of the rain fall for each year. To do this we have to add all the data and then divide by the total number of data.

Year 1: number of data = 12:

[tex]\bar{x_1}=\frac{2+2+0+0+0+1+2+2+3+2+2+2}{12}=\frac{18}{12}=\frac{3}{2}=1.5[/tex]

Year 2: number of data = 12:

[tex]\bar{x_2}=\frac{1+1+0+0+0+0+2+2+2+1+2+1}{12}=\frac{12}{12}=1[/tex]

The difference is:

[tex]\bar{x}_1-\bar{x}_2=1.5-1=0.5[/tex]

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