Answer:
The weight of an adult male who is 172 cm tall is 89.36 kg.
Step-by-step explanation:
The regression equation representing the relationship between height and weight of a person is:
![\hat y=-105+1.13x](https://tex.z-dn.net/?f=%5Chat%20y%3D-105%2B1.13x)
Here
<em>y</em> = weight of a person
<em>x</em> = height of a person
The information provided is:
![\bar x=167.90\ cm\\\bar y=81.47\ kg\\r (X, Y) = 0.228\\p-value=0.023\\\alpha =0.05](https://tex.z-dn.net/?f=%5Cbar%20x%3D167.90%5C%20cm%5C%5C%5Cbar%20y%3D81.47%5C%20kg%5C%5Cr%20%28X%2C%20Y%29%20%3D%200.228%5C%5Cp-value%3D0.023%5C%5C%5Calpha%20%3D0.05)
The hypothesis to test the significance of the correlation between height and weight is:
<em>H₀</em>: There is no relationship between the height and weight, i.e. <em>ρ</em> = 0.
<em>Hₐ</em>: There is a relationship between the height and weight, i.e. <em>ρ </em>≠ 0.
Decision rule:
If the <em>p</em>-value of the test is less than the significance level, then the null hypothesis will be rejected and vice-versa.
According to information provided:
<em>p</em>-value = 0.023 < <em>α</em> = 0.05
The null hypothesis was rejected at 5% level of significance.
Thus, concluding that there is a relationship between the height and weight.
Compute the weight of an adult male with height, <em>x</em> = 172 cm as follows:
![\hat y=-105+1.13x](https://tex.z-dn.net/?f=%5Chat%20y%3D-105%2B1.13x)
![=-105+(1.13\times 172)\\=-105+194.36\\=89.36](https://tex.z-dn.net/?f=%3D-105%2B%281.13%5Ctimes%20172%29%5C%5C%3D-105%2B194.36%5C%5C%3D89.36)
Thus, the weight of an adult male who is 172 cm tall is 89.36 kg.