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 tails? times
Answer
Explanation:
Step1: Determine probability of tails per - flip
The probability of getting tails in a single fair - coin flip is $p=\frac{1}{2}$.
Step2: Use expected - value formula
The expected value formula for a binomial experiment is $E(X)=np$, where $n$ is the number of trials and $p$ is the probability of success in a single trial. Here, $n = 2$ (number of coin flips) and $p=\frac{1}{2}$ (probability of getting tails in a single flip). So, $E(X)=2\times\frac{1}{2}$.
Step3: Calculate the expected value
$2\times\frac{1}{2}=1$.
Answer:
1