Answer
Yes, the number of arrivals increased significantly.
Work Step by Step
Total number of clients before advertising:
$Σ[x\times E(x)]=0\times0.4958+1\times2.974+2\times8.924+3\times17.85+4\times26.78+5\times32.12+6\times32.12+7\times27.54+8\times20.66+9\times13.77+10\times8.26+11\times4.506+12\times2.252+13\times1.040+14\times0.4456+15\times0.1783+16\times0.06684\approx1200$
Total number of clients after advertising:
$Σ[x\times Frequency(x)]=1\times4+2\times5+3\times13+4\times23+5\times25+6\times28+7\times25+8\times27+9\times21+10\times15+11\times5+12\times3+13\times2+14\times2+15\times0+16\times2=1345$
The number of arrivals increased significantly: $\frac{1345-1200}{1200}=0.121=12.1$%
