bac-s-maths 2014 Q1C

bac-s-maths · France · caledonie Modelling and Hypothesis Testing
A study conducted in 2000 showed that the percentage of French people regularly consuming ice cream was 84\%. In 2010, out of 900 people surveyed, 795 of them declared consuming ice cream.
Can we affirm, at the 95\% confidence level and based on the study of this sample, that the percentage of French people regularly consuming ice cream remained stable between 2000 and 2010?
A study conducted in 2000 showed that the percentage of French people regularly consuming ice cream was 84\%. In 2010, out of 900 people surveyed, 795 of them declared consuming ice cream.

Can we affirm, at the 95\% confidence level and based on the study of this sample, that the percentage of French people regularly consuming ice cream remained stable between 2000 and 2010?