# A student measures the time period of 100 oscillations of a simple pendulu m four times

A student measures the time period of 100 oscillations of a simple pendulu m four times. The data set is 90 s, 91 s, 95 s and 92 s. If the minimum division in the measuring clock is 1s, then the reported mean time should be :

(1) 92 ± 2 s

(2) 92 ± 5.0 s

(3) 92 ±1.8 s

(4) 92±3 s