During 2017, the weekly amount of pocket money given to a random sample of 15-year-old children living in Chicago is: 

$9.50, $10.50, $12.50, $7.50, $20.00, $13.00, $14.00, $16.00, $17.50, $10.00

During 2016, the median amount of pocket money given to 15-year-olds in Chicago was $11.00. Carry out a sign test to investigate the claim that the median weekly amount of pocket money given to 15-year-old children in Chicago has increased since 2016. Test this claim at the 10% level of significance.