A random sample of size n1 = 14 is selected from a normal population with a mean of 74 and a standard deviation of 7.A second random sample of size n2 = 6 is taken from another normal population with mean 70 and standard deviation 12. Let XjandX2 be the two sample means. Find: (a) The probability that X1 – X2 exceeds 3. - (b) The probability that 4.5 < X1 - X2 < 5.8. Round your answers to two decimal places (e.g. 98.76). (a) i ! (b) i

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.