Given the recent rise of short videos on social media, marketers wonder if adult attention span has decreased. Five years ago, the average number of boxes on the attention color match test was 4.76 boxes. Higher number of boxes represents higher levels of attention. The distribution of scores is not normal.

A recent random sample of 60 Arizona adults had a sample mean of 4.47 boxes with a standard deviation of 1.21.

At the =0.05 significance level, has average adult attention span decreased?

Compute the test statistic. Round to 3 decimal places.