I have to find the sample size for the information below and I am not sure how to go about doing that if someone could help me I would appreciate that.
The question of whether Friday the 13th is an unusually unlucky day or whether this idea is just superstition was evaluated. Researchers in the United Kingdom examined the relation between (a) numbers of traffic accidents on past Friday the 13ths versus (b) numbers of accidents occurring on Friday the 6ths (all between July 1990 and November 1992).
Friday the 6th-
Friday the 13th