Q1 The following bivariate data shows the length, X (in inches) and weight Y (in kgs) of a sample of six iron rods 16 8 Length 12 Weight 4 18 12 20 14 24 20 32 22 (i) Present the above data on a scatter diagram. (ii) Obtain the correlation coefficient between the length and weight of iron rod and comment on the results, (iii) Find the equation of regression line of weight on length using least square method. (iv) Find the equation of regression line of length on weight using least square method. (v) Estimate the weight of the iron rod when the length is 25 inches.

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Q1 The following bivariate data shows the length, X (in inches) and weight
Y (in kgs) of a sample of six iron rods
Length 12
16
Weight 4
8
18
12
20
14
24
20
32
22
(i) Present the above data on a scatter diagram.
(ii) Obtain the correlation coefficient between the length and weight
of iron rod and comment on the results,
(iii) Find the equation of regression line of weight on length using
least square method.
(iv) Find the equation of regression line of length on weight using
least square method.
(v) Estimate the weight of the iron rod when the length is 25 inches.
Transcribed Image Text:Q1 The following bivariate data shows the length, X (in inches) and weight Y (in kgs) of a sample of six iron rods Length 12 16 Weight 4 8 18 12 20 14 24 20 32 22 (i) Present the above data on a scatter diagram. (ii) Obtain the correlation coefficient between the length and weight of iron rod and comment on the results, (iii) Find the equation of regression line of weight on length using least square method. (iv) Find the equation of regression line of length on weight using least square method. (v) Estimate the weight of the iron rod when the length is 25 inches.
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