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55. In order to predict with 90% confidence the expected value of y for a given...

55. In order to predict with 90% confidence the expected value of y for a given value of x in a simple linear regression problem, a random sample of ten observations is taken. Which of the following t-table values would be used?

A: 1.860

B: 2.306

C: 1.812

D: 2.228

58. Consider a multinomial experiment with 200 trials, and the outcome of each trial can be classified into one of five categories. In this case, how many degrees of freedom would be associated with the chi-square goodness-of-fit test?

A: 4

B: 40

C: 195

D: 5

math   Statistics-And-Probability   
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