Essay About Corner Shop And P X Var

Stratified Sampling
Essay Preview: Stratified Sampling
Report this essay
Strata: Proportion Of Variability Of Data Gathering Cost
Retail Enviroment Type Customers Expenditure Per Respondent
Online Grocery Retailer 0.13 23 0.5
Supermarket 0.62 13 1
Small Grocer 0.11 4 2
Corner Shop 0.05 2 4.5
Daily Food Market 0.09 3 2
p x var p x var ÐЃÐЂ ÐЃДЈc
Online grocery retailer 2.99 4.23
Supermarket 8.06 8.06
Small grocer 0.44 0.31
Corner shop 0.1 0.05
Daily food market 0.27 0.19
Total 11.86 12.84
Sample of size 1300
Prop x 100 p x var ÐЃÐЂ Ї” p x var x 100 p x var ÐЃÐЂÐЃДЈc ÐЃÐЂ Ї”p
x var ÐЃÐЂÐЃДЈc x 100
Retail Enviroment type Proportional Optimal Disproportional
Online Grocery Retailer 169 328 427
Supermarket 806 883 817
Small Grocer 143 48 31
Corner Shop 65 11 5
Daily Food Market 117 30 20