Two batches, P and Q, each contain 5 observations. For batch P, ∑x=100 and ∑x2=2100. For batch Q, ∑x=110 and ∑x2=2500. Which batch shows greater spread as measured by standard deviation?
a) Both batches have the same spread
b) Batch P
c) Batch Q
d) Spread cannot be compared with the given information