c If the mean of the side lengths of a triangle is 8 cm , then the perimeter of the triangle is \( \quad(8,15,18,24 \) d The outlier of the following values \( 32,37,36,5,40,38 \) and 39 is

What is a scatter plot?

What is a scatter plot?

b] Calculate the arithmetic mean and the standard deviation of the values \( 12,13,16,18,21 \)

\( \left. \begin{array} { l } { \hat { \beta } _ { 2 } = \frac { ( \sum y _ { i } x _ { 2 i } ) ( \sum x _ { 3 i } ^ { 2 } ) - ( \sum y _ { i } x _ { 3 i } ) ( \sum x _ { 2 i } x _ { 3 i } ) } { \sum x _ { 2 i } ^ { 2 } \sum x _ { 3 i } ^ { 2 } - ( \sum x _ { 2 i } x _ { 3 i } ) ^ { 2 } } } \\ { \hat { \beta } _ { 3 } = \frac { ( \sum y _ { i } x _ { 3 i } ) ( \sum x _ { 2 i } ^ { 2 } ) - ( \sum y _ { i } x _ { 2 i } ) ( \sum x _ { 2 i } x _ { 3 i } ) } { \sum x _ { 2 i } ^ { 2 } \sum x _ { 3 i } ^ { 2 } - ( \sum x _ { 2 i } x _ { 3 i } ) ^ { 2 } } } \end{array} \right. \)

Defina um diagrama de dispersão e explique sua utilidade na análise de dados.