The following n : 1C} observations are a sample from a normal population. 7.3 7.0 6.4 7.5 16 6.3 6.8 7.? 6.5 6.9 (a) Find the mean and standard deviation of these data. (Round your standard deviation to four decimal places.) m... S standard deviation E (b) Find a 99% upper one-sided condence bound for the population mean In. (Round your answer to three decimal places.) E (c) Test HO: In = 7.5 versus Ha: p 5 O Ho: M t State the conclusion. O Ho is not rejected. There is sufficient evidence to conclude that the dissolved oxygen content is less than 5 ppm. O Ho is rejected. There is insufficient evidence to conclude that the dissolved oxygen content is less than 5 ppm. O Ho is not rejected. There is insufficient evidence to conclude that the dissolved oxygen content is less than 5 ppm. O Ho is rejected. There is sufficient evidence to conclude that the dissolved oxygen content is less than 5 ppm. You may need to use the appropriate appendix table or technology to answer this question.Organic chemists often purify organic compounds by a method known as fractional crystallization. An experimenter wanted to prepare and purify 4.85 g of aniline. Ten 4.85 g quantities of aniline were individually prepared and purified to acetanilide. The following dry yields were recorded 3.84 3.80 3.87 3.87 3.92 3.36 3.63 4.02 3.73 3.81 Estimate the mean grams of acetanilide that can be recovered from an initial amount of 4.85 g ofaniiine. Use a 95% confidence interval. (Round your answers to three decimal places.)