Page 262 - Touhpad Ai

21 st
Century #Experiential Learning
Skills
1. A shopkeeper sells pens in his shop. He sells the pens for a different cost price for six weeks. He notes the
number of pens, y, sold each week. The results are shown in the table below:

x (cost price) 15 20 25 30 35 40
y (no. of pens sold) 65 60 55 45 38 35

Plot the scatterplot for the above using MS Excel. Also find out the regression equation using Excel.
2. Use the Linear Regression Calculator to find the 'Line of Best Fit'. Go to
https://www.graphpad.com/quickcalcs/linear1/ or scan the QR code. Enter the values of
x and y, then click on 'Calculate Now' to visualise the scatterplot.
3. How well have you understood linear regression? Play the following game by matching the tiles
and uncovering the image underneath. Go to https://www.studystack.com/picmatch-1176825
or scan the QR code.

Answers
Exercise
A. 1. c 2. d 3. b 4. c 5. d 6. c 7. a 8. c 9. b 10. a
B. 1. Least Squares 2. Plan 3. Hierarchical 4. Field (or ID)
5. Structured Query Language 6. Data Warehouses 7. Predict
8. Dependent 9. Relationship 10. Errors
C. 1. False 2. True 3. False 4. False
5. True 6. True 7. True 8. False
9. False 10. False

260 Touchpad Artificial Intelligence - XI