Students were given different drug treatments before revising for their exams. Some were given a memory drug, some a placebo drug and some no treatment. The exam scores (%) are shown below for the three different groups: Memory Drug Placebo No Treatment 70 37 77 43 10 83 50 17 90 57 23 97 83.40 63 30 Мean 50.00 16.60 Variance 112.30 109.00 112.30 Grand Mean 50.00 Grand Variance 892.14

Q: Find the following

A: Given, ∫5z+2dz To solve the above integration.

Q: value of ∑n=1∞(6an+9bn) if ∑n=1∞an=8 and ∑n=1∞bn=2.

A:

Q: 5. x₁ + x₂ -3x1 3 +2x30 X₂ - 2x3 = 2

A: According to Bartley guidelines, these are separate questions. Please ask second question…

Q: 1) Prove that there are no positive integer solutions to the equation x2-y?=1

A:

Q: Find two positive real numbers such that they add to 40 and their product is as large as possible.

A: Our Aim is to find two positive real numbers a and b such that they add to 40 and their product is…

Q: Write a quadratic equation in X such that the sum of itr roots is -2 and the product of its roots is…

A:

Q: 3x+ 4xx+16x+20x+9 (x -2Xx*+3)'

A:

Q: If the sum of the roots of the equation 1/(x+ a) + 1/(x + b) = 1/c is zero, then prove that the…

A:

Q: Show that Q(4 - i) = Q(1 + i), where i = √-1.

A: To show that ℚ4-i=ℚ1+i. That is we need to show that ℚ4-i⊆ℚ1+i and ℚ1+i⊆ℚ4-i. Here i=-1 that is…

Q: Show that the equation (1, 2, 3) × v = (−1, 2, a) has no solutionfor a = −1

A: Consider the given: Given equation:1,2,3×v=−1,2,aLet v=x,y,z1,2,3×v=ijk123xyz…

Q: Calculate principle value of (21) ²¹

A:

Q: the smallest possibl product of the two numbers x>= 0 and y<= 0, such that 2x-y=120 is:

A: Let x and y be two numbers such that  x≥0,y≤0, 2x-y=120y=2x-120

Q: Solve the Coout's linear wsuation by method. 2n, t0 x + X3 = 4 -3n, +4Xz -213 6.

A: To Determine :-  The linear equation by Crout's method . 2x1 + 0x2 + x3 =4-3x1 + 4x2 -2x3 =-3x1 +7x2…

Q: ® Find such that a hon-zero ordereol pair, AX=6X For 7 2 A = 4 14

A: Non zero ordered pair

Q: Show that rcjs0 = rcjs(-0)

A: Disclaimer: Since you have asked for hand written solution and currently we are not providing any…

Q: Find the value of each of a,b,c so that 6x3 − 7x2 − x + 2 = (x − 1)(ax2 + bx + c)

A: Given equation is : 6x3-7x2-x+2=x-1ax2+bx+c To find the value a, b, and c

Q: (2 + j)?

A:

Q: Answer the question and gets thumbup plzzzzzz

A: here we use fermat little theorem

Q: 4. Simplify: (i – 1)² – (-i – 1)² + i*, i = v-1

A: Given: i-12--i-12+i4 ,  i=-1

Q: Derive the formula for the False Position Method

A: Derive using the concept of similar triangles.

Q: Az = b, where A = (A) 7/6 1/6 (D) [2/3] 1 3 b = 189 11 [Q] X2 Compute projcol(A) (b), the projection…

A: The matrix .The objective is to find the projection of  onto .

Q: Use Cramer's rule and solve 6x-4z=26 7x+8y+5z=122 9x-9y=54

A: Use Cramer’srule and solve.