Question

Show work please

A researcher measures the association between the radius of the forearm (inches) and the gripping strength (pounds) of 20 teenagers given by the graph below. 70 50 90 11 1 314 Crcum The graph indicates which type of association between forearm radius and grip strength The measurement grip strength is the The type of association between circumference and grip strength is a. i. Positive ii. Negative ii. No association b. i. Explanatory variable i Response variable c. i. Strong ii. Weak iii. non-linear d. The correlation coefficient that best describes the data is i. r--0.63 ii. r 0.36 ii. r 0.84 iv. r 0.15 e. If the value located at (14, 38) was removed it would cause the correlation to become i. Weaker ii. Stronger iii. Switch direction iv. Stay the same f. The best fit model is given by y -2.81x+ 16, calculate the predicted value when x-14 and the corresponding residual if the observed value was y 39

Answer 1

a) positive     {image fitting a line through all points,slope would be positive}
b) respose variable   {streth is explained by radius of forearm}
c) strong  
d) r = 0.84
e) stronger

f)
y^= 2.81 *14 + 16 = 55.34
residual = y - y^
= 39 - 55.34
= -16.34