A researcher wants to estimate the mean grade point average of all current college students in the United States she has developed a procedure to standardized scores from colleges using something other than scale between zero and four how many grade point averages must be obtained so that the sample mean is point one of the population mean assume that a 90% confidence level is desired also assume that a pilot study shows the population standard deviation is .88

intensity of the vector is v= √37 ≈ 6.08 units and make angle ∡α ≈ 9.46° with east direction

step-by-step explanation:

required vector is consists of the two componentsvx= 2+4=6 units   and vy= 1 unit and vx ⊥ vywe will use pythagorian theorem to find intensity of the vector vv∧2 = vx∧2 + vy∧2 => v = √vx∧2 + vy∧2 = √6∧2 + 1∧2 = √36+1 = √37 ≈ 6.08 unitsthe angle ∡α between vector and east direction we wil find with tanαtanα = 1/6 => α = arc tanα = arc 1/6 => α ≈ 9.46°

hope this

maya’s expression will generate the wrong sum because she violated the commutative property.

step-by-step explanation: