Question: Please help me with the following problem. The following stem-and-leaf plot gives the weight in kilograms of 30 stalks of an experimental variety of plantain

Please help me with the following problem.

The following stem-and-leaf plot gives the weight in kilograms of 30 stalks of an experimental variety of plantain fruit that has been genetically altered to contain a greater level of protein: kg kg/10 9 8 8 246 7 3578 6 01378 5 123478 8 4 12467 01357 a. Compute s 2. b. Find a 95% confidence interval for of. c. Perform a test of hypothesis at the 5% level of significance to determine whether or not this sample came from a population that has a variance of 3.0. d. Find a 95% confidence interval for u using s to approximate of

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