QUESTION 7 "If a given set of piano performances are graded with a mean = 80 and a standard deviaton = 8, what is the Z-score of a performance graded an 84?" 84 O 2 0.5 O 8 0000

Q: 12 5(.8)0

A: We can solve given problem by using G.P series.

Q: 1+3+5+7...+1003

A: Sum of n odd numbers, where the last term of the series is (2n – 1), is, Sn = 1 + 3 + 5 + …. + (2n –…

Q: 5/14+1/6

A: 514+16=15+742

Q: 4root2*4root2

A:

Q: 7 2 3k+1= [A] k = 2

A: Consider the equation ∑n=273k+1=A We have to find the value of A Expand the summation of left hand…

Q: 6   9,171.6

A:

Q: 4. Fill in the following contingency table with the number of observations that fall into each com-…

A: x1 = number of colored oranges from Skittles brand = 77 x2 = number of colored oranges from M &…

Q: (n + 4)3 =

A: Given query is to expand (n+4)3

Q: 12 16

A: We know that If a perpendicular is drawn from the vertex of right angle triangle of a right triangle…

Q: 10| 5 10 10 -5 -5

A:

Q: 18(9+7)+3

A: 18(9+7)+3

Q: 6. 3 (2s+5)³

A:

Q: expand (x+y)6

A:

Q: 3(m – 5) + m

A: 3(m-5)+m=0 3m-15+m=0 add both side 15 we get 2m=15