Happy Children. A Harris Poll revealed that of 2241 sampled American parents, 53.0% secondary-school children’s parents reported that their children had 20 hours of weekly free time. These parents were found to believe that their child was “happy”.

a. At the 5% significance level, do the data provide sufficient evidence to conclude that more than 5 of 10 Americans think children with more free time are happy?

b. Repeat part (a), using a 1% level of significance.