Eight trials are simulated. The results are shown in the table. Simulation
105 104 110 112
114 106 108 109
What is the estimated margin of error, using standard deviation?

Enter your answer, rounded to two decimal places, in the box.

± =

2.897

This should be you're anwser.

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116