3. in a test of weight loss programs, 40 adults used the atkins weight loss program. after 12 months, their mean weight loss was found to be 2.1 lb, with a standard deviation of 4.8 lb. construct a 90% confidence interval estimate of the standard deviation of the weight loss for all such subjects. does the confidence interval give us information about the effectiveness of the diet?

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute