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#In order to find the totol amount of each row we need to multiply the Quantity and Datal[ 'values '] = Data1['Quantity'] * Data1. ['unitprice'] # this Line is used for finding the average or mean for all the data in that column average_df = Datal['values'].mean() # print the average_df print(average_df)

#In order to find the totol amount of each row we need to multiply the Quantity and Datal[ 'values '] = Data1['Quantity'] * Data1. ['unitprice'] # this Line is used for finding the average or mean for all the data in that column average_df = Datal['values'].mean() # print the average_df print(average_df)

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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What  is the python code in getting the average purchase amount 

Company likes to find out overall average purchase-amount among all transactions [ one transaction indicates one invoice number]. 

Expected output: Average purchase among all transactions = 44.39

e): 1 #In order to find the total amount of each row we need to multiply the Quantity and the Unitprice and create a new #column c 2 3 Datal['Values '] = Data1['Quantity'] * Data1. ['UnitPrice'] %3D 4 5 6 # this Line is used for finding the average or mean for all the data in that column 7 average_df = Data1['Values'].mean() 10 # print the average_df 11 print(average_df) 12 13 File "kipython-input-40-3cf5f94ae26a>", line 3 Data1['Values'] = Datal['Quantity'] * Data1.['UnitPrice'] SyntaxError: invalid syntax
Transcribed Image Text:e): 1 #In order to find the total amount of each row we need to multiply the Quantity and the Unitprice and create a new #column c 2 3 Datal['Values '] = Data1['Quantity'] * Data1. ['UnitPrice'] %3D 4 5 6 # this Line is used for finding the average or mean for all the data in that column 7 average_df = Data1['Values'].mean() 10 # print the average_df 11 print(average_df) 12 13 File "kipython-input-40-3cf5f94ae26a>", line 3 Data1['Values'] = Datal['Quantity'] * Data1.['UnitPrice'] SyntaxError: invalid syntax
InvoiceNo StockCode Description Quantity InvoiceDate UnitPrice CustomerlD Country 536365 85123A WHITE HANGING HEART T-LIGHT HOLDER 01/12/2010 8:26 2.55 17850.0 United Kingdom 536365 71053 WHITE METAL LANTERN 01/12/2010 8:26 3.39 17850.0 United Kingdom 2 536365 84406B CREAM CUPID HEARTS COAT HANGER 8 01/12/2010 8:28 2.75 17850.0 United Kingdom 3 536365 84029G KNITTED UNION FLAG HOT WATER BOTTLE 01/12/2010 8:28 3.39 17850.0 United Kingdom 4 536365 84029E RED WOOLLY HOTTIE WHITE HEART. 01/12/2010 8:26 3.39 17850.0 United Kingdom 195 536388 22469 HEART OF WICKER SMALL 12 01/12/2010 9:59 1.65 18250.0 United Kingdom 196 538388 22242 5 HOOK HANGER MAGIC TOADSTOOL 1.85 18250.0 United Kingdom 12 01/12/2010 9:59 197 536389 22941 CHRISTMAS LIGHTS 10 REINDEER 6 01/12/2010 10:03 8.50 12431.0 Australia 198 536389 21622 VINTAGE UNION JACK CUSHION COVER 8 01/12/2010 10:03 4.95 12431.0 Australia 199 536389 21791 VINTAGE HEADS AND TAILS CARD GAME 12 01/12/2010 10:03 1.25 12431.0 Australia 200 rows x 8 columns
Transcribed Image Text:InvoiceNo StockCode Description Quantity InvoiceDate UnitPrice CustomerlD Country 536365 85123A WHITE HANGING HEART T-LIGHT HOLDER 01/12/2010 8:26 2.55 17850.0 United Kingdom 536365 71053 WHITE METAL LANTERN 01/12/2010 8:26 3.39 17850.0 United Kingdom 2 536365 84406B CREAM CUPID HEARTS COAT HANGER 8 01/12/2010 8:28 2.75 17850.0 United Kingdom 3 536365 84029G KNITTED UNION FLAG HOT WATER BOTTLE 01/12/2010 8:28 3.39 17850.0 United Kingdom 4 536365 84029E RED WOOLLY HOTTIE WHITE HEART. 01/12/2010 8:26 3.39 17850.0 United Kingdom 195 536388 22469 HEART OF WICKER SMALL 12 01/12/2010 9:59 1.65 18250.0 United Kingdom 196 538388 22242 5 HOOK HANGER MAGIC TOADSTOOL 1.85 18250.0 United Kingdom 12 01/12/2010 9:59 197 536389 22941 CHRISTMAS LIGHTS 10 REINDEER 6 01/12/2010 10:03 8.50 12431.0 Australia 198 536389 21622 VINTAGE UNION JACK CUSHION COVER 8 01/12/2010 10:03 4.95 12431.0 Australia 199 536389 21791 VINTAGE HEADS AND TAILS CARD GAME 12 01/12/2010 10:03 1.25 12431.0 Australia 200 rows x 8 columns
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