Compute the loocv errors that result from fitting the following four models using least squares: y = β+ + β-x + ε y = β+ + β-x + β5x5 + ε y = β+ + β-x + β5x5 + β6x6 + ε y = β+ + β-x + β5x5 + β6x6 + β7x7 + ε

Aletter in the word electric is chosen at random. complete each sentence. there are possible outcomes. the theoretical probability that a vowel will not be chosen is the ratio . the theoretical probability that the letter n will be chosen is .