Find the skewness coefficient Çarpıklık katsayısnrbutunuz 25 31 32 42 45 56 12 14 17 20 Calculate to according the formulation paper. Don't use excel Calculate according to the formula given to you. Don't use Excel A) 28,40 B) 0,09 C) 29,65 O D) 3,04 O E) 6,79

A dlinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 16 subjects had a mean wake time of 105.0 min. After treatment, the 16 subjects had a mean wake time of 99.5 min and a standard deviation of 20.3 min. Assume that the 16 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment. min