Question: Compare a t-distribution to a normal distribution. Which is used for regression analysis ? Assume there were 20 data sets used to determine values for

Compare a t-distribution to a normal distribution. Which is used for regression analysis ? Assume there were 20 data sets used to determine values for a and b. How many degrees of freedom should be used to determine the t value ? What will be the t value for a two-sided interval at a 95% confidence level ?

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