Refer to the accompanying table, which describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Find the mean and standard deviation for the number of girls in 8 births. Click the icon to view the data table. The mean is u= girl(s) (Round to one decimal place as needed.). The standard deviation is a girl(s). (Round to one decimal place as needed.) Table of numbers of girls and probabilities Number of Girls x 0 1 2 3 4 5 6 7 8 Print P(x) 0.006 0.032 0.101 0.227 0.270 0.226 0.106 0.026 0.006 Done D X

-> i www.awn.aleks.com/alekscgi/x/Isl exe/1o_u-IgNslkasNW8D8A9PVVR18Z4766mUkQengouPuJ6IEWNMG9szF1Oin3y3Vp6txMbDStjhTUa5DgOCd47DtwNpEX1Q5q8pY1-2.Jp-Do. O CONFIDENCE IINTERVALS AND HYPOTHESIS TESTING OOO OD Raul v Confidence interval for the population mean: Use of the t. An ecologist randomly samples 19 plants of a specific species and measures their heights. He finds that this sample has a mean of 16 cm and a standard devlation of 4 cm. If we assume that the height measurements are normally distributed, find a 95% confidence interval for the mean height of all plants of this species. Then find the lower limit and upper limit of the 95% confidence interval. Carry your Intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: Upper limit: Explanation Check & W k m Chemebook

Answer number 2

6+5.2-4=

24 2 = 4 x-6

Number 25