if you flip a coin 40 times, what is the best prediction possible for the number of times it will land on…
if you flip a coin 40 times, what is the best prediction possible for the number of times it will land on heads? times
Answer
Explanation:
Step1: Determine probability of heads
The probability of getting heads in a single - fair coin flip is $p=\frac{1}{2}$.
Step2: Use expected - value formula
The expected value $E(X)$ of a binomial experiment (coin - flipping is a binomial experiment) is given by $E(X)=n\times p$, where $n$ is the number of trials and $p$ is the probability of success on a single trial. Here, $n = 40$ and $p=\frac{1}{2}$. $E(X)=40\times\frac{1}{2}$ $E(X) = 20$
Answer:
20