1.The results of a survey conducted by Unilever on Households using Palmolive soap this year are distributed as follows:

Soap Brand Number of Household samples

palmolive 1200

brisk 1600

lux 1900

lifebuoy 1250

camay 1500

medicare 2100

brisk 1000

giv 750

other brands 3300

Test with alpha of 2%, whether the proportion of Households using Palmolive soap this year has changed significantly from last year which amounted to 10%.