Adata set has a mean of 112 and a standard deviation of 2.5.

what is the margin of error for this data set?

a. 224

b. 5

c. 56

d. 1.25

The margin of error for this data set is option B )5

Step-by-step explanation:

Given that a data set has a mean of 112 and a std deviation of 2.5

Since confidence interval level is not given, we can take it as 95% normally used much in finding margin of errors.

For 95% confidence interval, Z critical value is 1.96 or approximately 2.

Margin of error = Z critical * std deviation

= 2(2.5)

=5

Hence option B would b the right answer

The margin of error for this data set is option B )5

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form