if you flip a coin 4 times, what is the best prediction possible for the number of times it will land on…
if you flip a coin 4 times, what is the best prediction possible for the number of times it will land on tails? times
Answer
Explanation:
Step1: Identify probability of tails
The probability of getting tails in a single - 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, $n = 4$ (number of coin flips) and $p=\frac{1}{2}$ (probability of getting tails). $E(X)=4\times\frac{1}{2}$
Step3: Calculate the result
$4\times\frac{1}{2}=2$
Answer:
2