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In order to calculate confidence intervals and hypothesis tests, it is assumed that the errors are independent and normally distributed with mean zero and _______

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In order to calculate confidence intervals and hypothesis tests, it is assumed that the errors are independent and normally distributed with mean zero and _______ (a) Mean (b) Variance (c) SD (d) KNN I got this question in homework. The origin of the question is Linear Regression topic in chapter Commands, Packages, Visualizing Data and Linear Regression of R Programming Select the correct answer from above options

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Right answer is (b) Variance Easiest explanation: In order to calculate confidence intervals and hypothesis tests, it is assumed that the errors are independent and normally distributed with mean zero and variance.

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