Thirty hits were recorded with each of two cricket bats. For bat M the mean distance covered was 62 m with a standard deviation of 3 m, while for bat N the mean distance was also 62 m but the standard deviation was 6 m. Which statement correctly compares the consistency of the two bats?
(a) Both bats are equally consistent because their means are equal.
(b) Bat M is more consistent than bat N.
(c) Consistency cannot be judged without knowing the variances.
(d) Bat N is more consistent than bat M.