The Sample Data Below Are the Typing Speeds (In Words

question 12

Essay

The sample data below are the typing speeds (in words per minute) and reading speeds (in words per minute) of nine randomly selected secretaries. Here, x denotes typing speed, and y denotes reading speed.
$$\begin{array} { l l l l l l l l l l } \hline \mathrm { x } & 60 & 56 & 52 & 63 & 70 & 58 & 44 & 79 & 62 \\\hline \mathrm { y } & 370 & 551 & 528 & 348 & 645 & 454 & 503 & 618 & 500 \\\hline\end{array}$$
The regression equation $\hat { y } = 290.2 + 3.502 \mathrm { x }$ was obtained. Construct a residual plot for the data.

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Definitions:

Mean

The average of a set of values, calculated by adding all the numbers together and dividing by the count of the values.

Standard Deviation

A quantitative assessment that determines the range of difference or dispersion in a collection of data.

Mean

It is the central value of a discrete set of numbers, specifically, the sum of the values divided by the number of values.

Sample Data

A subset of data collected from a larger population, used for analysis and inference.