Final answer:
To find the values of a and b in the given set, we can use the formulas for finding the mean and variance of a set of numbers.
Step-by-step explanation:
To find the value of a and b, we need to use the formulas for finding the mean and variance of a set of numbers. The mean is found by adding up all the numbers and dividing by the total count, and the variance is found by subtracting the mean from each number, squaring the result, adding up all the squares, and dividing by the total count.
Using these formulas, we can set up two equations using the given mean and variance, substituting the variables a and b for the unknown numbers in the set. Solving these equations will give us the values of a and b.