Ahollow ball is made of rubber that is 1 centimeter thick. the ball has a radius of 5 centimeters at the outside surface. what is the approximate volume of rubber used to make the ball?

Evan went to the park and saw for animals each animal was either a duck or dog if he saw a total of 14 legs how many of each animal did he see

True or false? the sum of the differences (% - 7) is never zero for any distribution consisting of n observations.

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean