Empirical rule

Question 3 0/3 pts 9 3 99 @ Details For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 25 students, and the distribution of total study hours per week is bell-shaped with a mean of 12 hours and a standard deviation of 2.5 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and hours on Statistics each week. c) 99.7% of the students spend between hours and hours on Statistics each week. Question Help: Written Example )Message instructor Submit Question Jump to Answer\fQuestion 6 (1 point) For a spherically shaped gaussian surface, we are told that more electric field lines leave the surface than enter it. What conclusions can we make? Select all answers that apply. The gaussian surface encloses a negative total charge. The net flux through the gaussian surface is positive. It is impossible to find the electric field in the region unless more information is provided. It's not clear whether the charge enclosed by the gaussian surface is positive or negative. The electric field is constant over the gaussian surface. The gaussian surface encloses a positive total charge.O The charge qenc must be all the charge lying within the Gaussian surface. If the net flux through a Gaussian surface is zero it is certain there are no charges enclosed within the Gaussian surface. O The electric field E in the integral is due only to the charge qenc O Gauss' Law calculates the electric field only at the location of the Gaussian surface. O The charge qenc must be all the charge lying on the Gaussian surface. O Gauss's law holds only for symmetric charge distributions. O A Gaussian surface must be a closed surface (must cover a volume). O A Gaussian surface is a virtual surface used only for calculations. O A Gaussian surface must be a conductor. O The area vectors on the Gaussian surface must all be in the same direction as the electric field on the surface. O The charge qenc must be all the charge in the