A company claims that the mean weight of the produced gasket is exactly 60 grams with a standard deviation of 48. A random sample of 64 gaskets collected and the mean weight is 68 grams. What is the hypothesis sentence? (a = 0.05). Họ : u< 60 Hị : u> 60 Họ : u- 60 Hị : µ + 60 Họ : u> 60 H1 : u< 60 Họ : µ + 60 H1 : u- 60

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