What is the mean of the data set rounded to the nearest tenth? 0.7 1.1 0.8 1.6 1.6 2.2 1.1

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

Can someone me i’m confused. will give brainliest and a whole bunch of points

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%