In 2015, 43% of families ate dinner together every night. In a recent poll, 538 out of 1121 families ate dinner together every night. The researcher wants to test whether the % of families who eat dinner together every night has increased. Would they use a 1-sided or 2-sided hypothesis test?

Select one:

a.1-sided, right tailed

b.2-sided

c.1-sided, left tailed