Question 61524
Find the mean of the data 1st mentioned for each family.
Call that x1-bar
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Find the mean of the data mentioned 2nd for each family.
Call that x2-bar
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Test the hypothesis 
Ho: mu1 - mu2 = 0
Ha: mu1 - mu2 is not equal to 0
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Find the z-score for (x1-bar minus x2-bar)
Check to see if that z-score falls in the 
critical area associated with alpha = 10%
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Comment:
If this is not enough explanation let me know
Cheers,
Stan H.