Techgene Inc. is concerned about the number of bacteria produced by different cu

Techgene Inc. is concerned about the number of bacteria produced by different cultures. If the cultures have significantly different means or variances then experiments are messed up and poor results are produced. The following data have been collected:
(This data table can be copied and pasted to Excel.)Number of bacteria (in thousands)
Type A 91 89 83 101 93 98 144 118 108 125 138
Type B 62 76 90 75 88 99 110 140 145 130 110Use the appropriate test to determine if the culture types are different. That is we how certain are we that the cultures are form the same population or not?