Question

The accompanying data table shows the level of social media networking​ (measured as the percent of individuals polled who use social networking​ sites) and the GDP at purchasing power parity​ (PPP) per capita for each of 24 selected countries.

QUESTIONS:

a. Compute the covariance.

b. Compute the coefficient of correlation.

c. Based on parts (a) and (b), what conclusions can be reached about the relationship between the GDP and social media use?

GDP (PPP)	Social Media Usage (%)
7063	87
17923	87
4837	87
10157	84
5993	82
6394	82
14078	83
3897	83
16084	78
4637	78
16733	77
19886	71
17803	72
3567	73
19687	72
7858	71
3875	75
13360	73
17177	66
6611	70
6336	72
6330	69
13173	62
11067	46

a. The covariance is __

(Round to the nearest integer as​ needed.)

Answer 1

254526-10605.25, 24 75 n 24 S--x-731664862.5, s,- Σ (y-死 1980 s,-Σ (x-F) *(у-у)--21 870 1 a) Covariance = Σ (x-x) *(y-у,--21 8701 b) coefficient of correlation r = (хーズ)-(y-y) -218701 731664862.5 1980 =-0.1817 c) There is a week negative correlation between the GDP and social media use