Question 1:

Johnny wanted to know how many days per week people in his class exercise, so he asked 3 of his friends. The answers he got were 1, 3 and 5. Based on this, which of the following is true about the results Johnny found? Hint: Do the numbers [1,3,5] represent a population or a sample?

1. μ = 3, σ = 2
2. x̄ = 3, σ = -2
3. x̄ = 3, s = 2
4. x̄ = 3, s = 4

• Answer