Acertain region of america with over 500,000 households has a mean household income of $70,000 with a standard deviation of $20,000. economists plan to take random samples of 625 households and calculate the sample mean income for each sample.

1. calculate the sample mean

2. calculate the standard deviation of the sample.

Sherina wrote and solved the equation. x-56=230 x-56-56=230-56 x=174 what was sherina’s error? sherina’s work is correct. sherina only needed to subtract 56 from 230. sherina made a subtraction error when subtracting 56 from 230. sherina should have added 56 to both sides of the equation.

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. solve this quadratic equation using the quadratic formula. 2x2 - 2x=1 need asap