ath 1530 - Online 3.70 African droughts and dust is there a relabonship the amou

Question

ath 1530 - Online 3.70 African droughts and dust is there a relabonship the amount of dust carried over large areas of the Atlantic and the Caribbean and the amount of rainfall n African regions? In an article (by J. M Prospero and P.. Lamb, Science, vol 302, 2003, pp. 1024-1027) the following scatterplots were ustions and oorrelations. The precipitation index is a measure of raintfall. is3 30 1g Source J. M Prospero and P. J Lamb Science. vol. 302. 2003. pp. 1024-1027 a. Match the follewing regression equstions and correist ons with the appropriate graph. ()y A - 14 08-7.18 xr 075 (ii) y A = 18.00-2.36x; r=-044 (j7 1280-977 x b. Based on the scatterplcts anc

Explanation / Answer

Ans:

y=a+bx

a)

i)y=14.05-7.18x,r=-0.75

Scatter plot b belong to above regression equation.

ii)y=16-2.36x,r=-0.44

Scatter plot c belong to above regression equation.

iii)y=12.8-9.77x,r=-0.87

Scatter plot a belong to above regression equation.

(closer the data points to the line,r value will increase and more downward slope will have larger b vlaue.)

b)Dust amount and rainfall are negatively correlated.(if precipitaion index is low,dust level will be higher vice versa)

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