Arandom sample of 10 subjects have weights with a standard deviation of 11.0974 kg. what is the variance of their weights? be sure to include the appropriate units with the result.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Draw a scaled copy of the circle using a scale factor of 2

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