A sample of 21 independent observations is taken from a normal distribution of unknown meanu but known variance o = 79.42. The sample mean is 64.66 and the sample variance is 42. What is the width o the 98% confidence interval for u?

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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.