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-
139,246
134,012
137,055
133,732
123,552
121,139
128,293
124,631
124,609
117,584
Friday the 13th
138,548
132,908
136,018
131,843
121,641
118,723
125,532
120,249
122,770
117,263
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