Define un diagrama de dispersión y describe su propósito en la estadística.

2. Эмпирическая функция распределения.

What is a scatter plot?

Write the properties of Arithmetic mean Calculate the mean values of \( x \) and \( y \) for the following regression equations \( 8 x-10 y+66=0,40 x \quad 18 y=214 \) Write the normal equation of a second degree parabola Determine the spearman's rank correlation coeflicient for the following data \( n=9 \) and \( \sum d^{2}=176 \) List out the types of index numbers. 7. Determine the unweighted aggregates price index for the following data: \( \sum P_{1}=757 \) and \( \sum P_{0}=522 \) 5. What is cost of living index number? 6. Write down the formula for Time reversal and Factor reversal test.

1. Числовые характеристики.

\( \left. \begin{array} { | c | c | c | c | c | c | } \hline x _ { i } & { 2 } & { 3 } & { 4 } & { 5 } & { 6 } \\ \hline n _ { i } & { 6 } & { 8 } & { 5 } & { 2 } & { 1 } \\ \hline \end{array} \right. \)