The power goes out as sandra is trying to get dressed. if she has 7 white t-shirts and 13 colored t-shirts in her drawer, is it likely that she will pick a colored t-shirt in the dark? what is the probability of sandra picking a colored t-shirt? complete the explanation to explain your answers. enter the probability as a simplified fraction

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.