Suppose that two additional workers will be chosen to participate in the simulated escape exercise. denote their escape times by x27 and x28, and let xnew denote the average of these two values. modify the formula for a pi for a single x value to obtain a pi for xnew, and calculate a 95% two-sided interval based on the given escape data.

The two-way table shows the number of people whose hobbies are reading or solving puzzles and who either ride a motorcycle or don’t ride a motorcycle. among people whose hobby is reading, what is the relative frequency of not riding a motorcycle? express your answer as a decimal, and round it to the nearest hundredth if necessary. enter your answer in the box. reading solving puzzles ride a motorcycle 7 3 don't ride a motorcycle 5 9

What is 20+(5 x 2/5 )+ 3 show your work

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi