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{"ops":[{"insert":" Vanaspati oil is marketed in tins of 10 kg. A sample of 20 tins showed the mean weight as"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"9.5kg with standard deviation of 3 kg. Does the sample justify the claim that the mean "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"weight is 10 kg. Mention the level of significance, you use. "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"24) A random sample of 16 observations has mean 103.75cm. The sum of the squares of the "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"deviations from the mean is 843.75 cm. Can this sample be regarded as coming from the "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"population having 108.75cm as the mean? "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"25) A company supplies tooth-paste in a packing of 100gm. A sample of 10 packing\u2019s gave the "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"following weights in gm. "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"100.5, 100.3, 100.1, 99.8, 99.7, 99.7, 100.3, 100.4, 99.2, 99.3"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Does the sample support the claim of the company that the packing weighs 100 gm?"},{"insert":"\n"}]}

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