The 2011 Canadian Census at School project collected data on school-age children
ID: 3062958 • Letter: T
Question
The 2011 Canadian Census at School project collected data on school-age children. The following scatterplot below the mean wrist circumference of boys according to age:
Incorrect Question 2 0/1 pts The 2011 Canadian Census at School project collected data on school-age children. The following scatterplot below the mean wrist circumference of boys according to age: 175 165 155 145 135 711 13 15 17 19 Age (years) Can we use the coefficient of correlation formula we covered in class to measure the relationship? No because the age can not be considered as an explanatory variable No because the assumption of the coefficient of correlation formula is not satisfied Yes No because the data points are not enoughExplanation / Answer
Ans:
No,because the assumption of the cofficient of correlation formula is not satisfied.
(fourth assumption is not met,as line is curved)
Assumptions:
1)Level of measurement refers to each variable.
2)Related pairs refers to the pairs of variables.
3)Absence of outliers refers to not having outliers in either variable.
4)Linearity and homoscedasticity refer to the shape of the values formed by the scatterplot. For linearity, a “straight line” relationship between the variable should be formed. If a line were to be drawn between all the dots going from left to right, the line should be straight and not curved.
5) Homoscedasticity refers to the distance between the points to that straight line. The shape of the scatterplot should be tube-like in shape. If the shape is cone-like, then homoskedasticity would not be met.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.