if you flip a coin 8 times, what is the best prediction possible for the number of times it will land on…
if you flip a coin 8 times, what is the best prediction possible for the number of times it will land on heads? times
Answer
Explanation:
Step1: Identify 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 random variable $X$ (number of heads in $n$ coin flips) is given by $E(X)=n\times p$, where $n$ is the number of trials. Here, $n = 8$ and $p=\frac{1}{2}$. $E(X)=8\times\frac{1}{2}$
Step3: Calculate the result
$8\times\frac{1}{2}=4$
Answer:
4