The following data related the rubber percentage of two types of rubber plants, where the sample have been drawn independently. Test for their mean difference. 6.21 5.70 6.04 4.47 5.22 4.45 4.84 5.84 5.88 5.82 6.09 5.59 6.06 5.59 6.74 5.55 Type I Type II 4.28 7.71 6.48 7.71 7.37 7.20 7.06 6.40 8.93 5.91 5.51 6.36

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