Question

Step 1

**a.**

**Scatterplot of the data:**

**Software Procedure:**

Step-by-step software procedures to draw scatter plot using MegaStat software is as follows:

- Open an EXCEL file.
- In column
*A*and*B*, the**No item**and**Time**data were entered. - Click on Add Ins > click on MegaStat
**.** - Select
**Correlation/Regression>**Choose**Scatter plot.** - Select
**horizontal axis**as the column of**No item.** - Select
**vertical axis**as the column of - Click
**OK**.

Scatter plot using EXCEL software is given below:

Step 2

By checking the scatter plot it can be said that the most of the points are on the best fit line. Hence, it can be said that the fit is good.

Step 3

**e.**

**Prediction of amount of time needed to assemble a package containing 13 items using both models.**

*Using least-squares regression equation:*

From part **a**, the least-squares regression equation is:

y = 1.0...

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