Question

Mean daily calories Infant mortality rate (per 1,000 births)

1533    157

3505    9

1951    117

2688    27

1620 110

3453 9   

1650    156

3439 10

3439    47

3681    10

b. Compute r and r squared r2. r equals = nothing ​(Type an integer or decimal rounded to two decimal places as​ needed.)

Compute r squared r2. r squared r2 equals = nothing ​(Type an integer or decimal rounded to two decimal places as​ needed.)

Can you help me with this question, I only have 30 minutes left to solve. Thank you!!

Answer 1

X	Y	XY	X²	Y²
1533	157	240681	2350089	24649
3505	9	31545	12285025	81
1951	117	228267	3806401	13689
2688	27	72576	7225344	729
1620	110	178200	2624400	12100
3453	9	31077	11923209	81
1650	156	257400	2722500	24336
3439	10	34390	11826721	100
3439	47	161633	11826721	2209
3681	10	36810	13549761	100
Ʃx =	Ʃy =	Ʃxy =	Ʃx² =	Ʃy² =
26959	652	1272579	80140171	78074

Sample size, n =	10
SSxx = Ʃx² - (Ʃx)²/n =	7461403
SSyy = Ʃy² - (Ʃy)²/n =	35563.6
SSxy = Ʃxy - (Ʃx)(Ʃy)/n =	-485148

Correlation coefficient, r = SSxy/√(SSxx*SSyy) = -0.9418 = -0.94

Coefficient of determination, r² = (SSxy)²/(SSxx*SSyy) = 0.8870 = 0.89