Acertain group of test subjects had pulse rates with a mean of 79.679.6 beats per minute and a standard deviation of 10.110.1 beats per minute. would it be unusual for one of the test subjects to have a pulse rate of 139.8139.8 beats per minute?

What could explain what happened when the time was equal to 120 minutes

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab

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.