What is the difference between parametric and nonparametric test?

Quick using the information in the graph, one might speculate that a) w.w.i created increased job opportunities in the u.s. b) the election of president hoover in 1936 caused unemployment to decline. c) the return of soldiers following w.w.ii caused unemployment to increase in the u.s. d) the new deal programs of president roosevelt created employment opportunities in the u.s.

Which of the fallowing sports became spectator sport at the turn of the century ? a)basketball and boxing b)soccer and football c)racquetball and badminton d)polo and swimming

Which latin american country’s language and culture is greatly influenced by portugal