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**

Country
Life expectancy (years)
Infant mortality (deaths per 1,000 live births)
1
58
105
2
57
106
3
60
64
4
57
66
5
58
70
6
63
56
7
61
45
8
65
30
9
62
49
10
66
42
11
64
28
12
79
10
13
72
6
14
79
4
15
80
4
16
75
1
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