Twenty-five samples of size 4 resulted in grand average as 30.0 minutes and average range as 2.5 minutes for the Excellante Cleaning Company’s average time to completely clean a rug. Estimate the standard deviation of the process. Please type your answer in two decimal places.

Me! i'm really confused the isosceles trapezoids, abcd and efgh, are similar quadrilaterals. the scale factor between the trapezoids is 2: 3, line gh = 6 centimeters, line ad = 8 centimeters, and line ab is three times the length of line dc . use complete sentences to answer the following prompts and include all of your calculations in your final answer. a. write a similarity statement for each of the four pair of corresponding sides. b. write a congruence statement for each of the four pair of corresponding angles. c. determine the perimeter for each of the isosceles trapezoids.