The economic dynamism, which is the index of productive growth in dollars for countries that are designated by the World Bank as middle-income are in table #7.3.8 ("SOCR data 2008," 2013).Countries that are considered high-income have a mean economic dynamism of 60.29.Do the data show that the mean economic dynamism of middle-income countries is less than the mean for high-income countries?Test at the 5% level.

Table #7.3.8: Economic Dynamism of Middle Income Countries

25.8057

41.1648

49.1361

50.9866

37.4511

38.0793

61.9281

59.1724

51.915

37.7251

41.9543

39.6282

43.6952

39.6553

44.9346

33.6074

47.8506

42.0265

46.0521

21.6643

43.7178

48.6159

48.3652

58.0767

43.8555

43.6252