if you flip a coin 2 times, what is the best prediction possible for the number of times it will land on…
if you flip a coin 2 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 per flip
The probability of getting heads in a single - fair coin flip is $p=\frac{1}{2}$.
Step2: Use expected - value formula
The expected - value formula for a binomial distribution is $E(X)=np$, where $n$ is the number of trials and $p$ is the probability of success on a single trial. Here, $n = 2$ (number of coin flips) and $p=\frac{1}{2}$ (probability of getting heads). So, $E(X)=2\times\frac{1}{2}$.
Step3: Calculate the result
$2\times\frac{1}{2}=1$.
Answer:
1