A company developed synthetic coffee and claim that coffee drinkers could not distinguish it from the real product. A number of coffee drinkers challenged the company's claim, saying that the synthetic coffee tasted synthetic. In a test, carried out by an independent consumer protection body, 20 people were given a mug of coffee. Ten had synthetic brand and ten the natural, but they were not told which they had been given. Out of the ten given the synthetic brand, eight said it was synthetic and two said it was natural Use this information to test the coffee drinkers' claim as against the null hypothesis of the company's claim, at 5% significance level.