The distribution of the weights of loaves of bread from a certain bakery follows approximately a normal distribution. based on a very large sample, it was found that 10 percent of the loaves weighed less than 15.34 ounces, and 20 percent of the loaves weighed more than 16.31 ounces. what are the mean and standard deviation of the distribution of the weights of the loaves of bread?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

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.