A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 50.2, with a standard deviation of 9.4. Based on this information, complete the following statements about the distribution of the scores on the writing section for the recent year. (a)According to Chebyshev's theorem, at least of the scores lie between 31.4and 69.0. (b)According to Chebyshev's theorem, at least ▼(Choose one) of the scores lie between 22 and 78.4. The answers will be one of these percents 36,56,75,84,89

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