Find the mean difference in weights of the melons? Find the standard deviation of the difference in weights? If a Normal model can be used to describe the difference in weights, find the probability that the melon you got at the first store is heavier? This question aims to find the mean difference and standard […]

# Category Archives: Statistics Q&A

This question aims to find the value of $c$ given the probability distribution of a random variable $X$. In probability theory, a random variable is regarded as a real-valued function that is defined over a sample space of a random experiment. In other words, it describes the outcome of an experiment numerically. Random variables can […]

the mean trout lengths based on samples of size $5$. the average SAT score of a sample of high school students. the average male height based on samples of size $30$. the heights of college students at a sampled university all mean trout lengths in a sampled lake. In this question, we need to choose […]

The aim of this question is to understand the key concept of a random variable using the coin toss experiment which is the most basic binomial (experiment with two possible outcomes) experiment performed in probability theory. A random variable is nothing but a mathematical formula used to describe the outcome of statistical experiments. For example, […]