What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your answer to at least two decimal places. (If necessary, consult a list of formulas.) X S

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Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per
one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Also given is
the product of the birthrate and the female life expectancy for each of the twelve countries. (These products, written in the column labelled "xy", may aid in
calculations.)
Birthrate, x
(number of
births per
1000 pop.)
0
Female life
expectancy, y
(in years)
35.1
67.9
52.3
60.2
26.6
74.0
15.1
73.1
31.6
61.5
46.2
58.8
49.9
53.4
27.4
71.9
13.6
76.7
48.4
63.4
41.2
64.6
17.6
71.6
Send data to calculator ✓
xy
2383.29
3148.46
1968.4
1103.81
1943.4
2716.56
2664.66
1970.06
1043.12
3068.56
2661.52
1260.16
X
Female life expectancy
(in years)
Ś
85-
80+
75-
65-
60-
55+
Figure 1
50-
What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your
answer to at least two decimal places. (If necessary, consult a list of formulas.)
10 15
10 15 20 25 30 35 40 45 50 55 60
Birthrate
(number of births per 1000 pop.)
Transcribed Image Text:Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Also given is the product of the birthrate and the female life expectancy for each of the twelve countries. (These products, written in the column labelled "xy", may aid in calculations.) Birthrate, x (number of births per 1000 pop.) 0 Female life expectancy, y (in years) 35.1 67.9 52.3 60.2 26.6 74.0 15.1 73.1 31.6 61.5 46.2 58.8 49.9 53.4 27.4 71.9 13.6 76.7 48.4 63.4 41.2 64.6 17.6 71.6 Send data to calculator ✓ xy 2383.29 3148.46 1968.4 1103.81 1943.4 2716.56 2664.66 1970.06 1043.12 3068.56 2661.52 1260.16 X Female life expectancy (in years) Ś 85- 80+ 75- 65- 60- 55+ Figure 1 50- What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your answer to at least two decimal places. (If necessary, consult a list of formulas.) 10 15 10 15 20 25 30 35 40 45 50 55 60 Birthrate (number of births per 1000 pop.)
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