Problem #3: The hospital claims that its record shows that the mean weight of newly born babies is 7 lb with a standard deviation of 0.75 lb. A researcher takes a sample of 25 newly born babies and found to have a mean of weight of 6.73 lb. Test the claim at 5% level of significance. Correct test statistics: Either 1.8 or -1.8 Correct null hypo thesis: The mean weight of newly born babies is equal to 7 lbs. Please show the correct and complete solution

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