Question

Binomial Distribution Problem. A study suggested that 70% of internet searches used Google search engine. A sample of 25 searches is studied. What is the expected number of internet searches that used Google? For this problem we want just the answer. Please give up to 4 significant decimal places, and use the proper rules of rounding.

Answer 1

17.5

Explanation:

According to the study 70% of the internet searches used Google as search engine.

Thus if the event X is the proportion of the searches using Google engine, then expected value of the event X, E(X) = 0.7

From here we can find the expected number of internet searches of a sample of 25 people by multiplying 25 and 0.7, i.e 25*0.7=17.5