Does the data indicate that kitty brand is more lasting

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Reference no: EM133027037

Question: In KK Company, the average lasting time of two hair colour highlighting brands (Kitty and Melody) will be compared. Each brand is assigned to 20 customers at random. The distributions of both populations are normal. Table 2 contains the information.

Brands	Sample mean number of months colour hightlighting lasts	Population standard deviation
Kitty	3	0.33
Melody	2.9	0.36

Table 1

Does the data indicate that Kitty brand is more lasting than Melody brands? Test at a 5% level of significance.

Reference no: EM133027037

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