To find out approximately how many minutes students in a high school are spending texting while in class, the guidance counselor
conducts a carefully designed and implemented random survey. The table below shows the number of minutes per week these randomly selected students text in class. Minutes Per Week Students Text in Class
What is the estimated number of minutes per week all students in this school, the population mean, text while in class based on the sample, rounded to the nearest tenth of a minute?
You can use the pythagorean theorem. Now lets write out what we know.
Shorter leg = x Longer Leg = x + 7 Hypotenuse = x - 7
Now solve for x x = 28 Since you know x = 28, which is the shorter leg, you can solve for the rest by just plugging in 28 where x is located. For instance, longer let is x + 7 so 28 + 7 = 35