The grade distributions of a Stats class (final mark) forthree previous years ar

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The grade distributions of a Stats class (final mark) forthree previous years are given in the following table:                                     Fail            50-64%         65-79%               80-100%          1975-76               9                  16                 26                       32          1976-77               6                  35                37                         8          1977-78               6                   28               20                         9 Are the grade distributions independence of year (class)? Drawyour conclusion using 0.01 level of significance. The grade distributions of a Stats class (final mark) forthree previous years are given in the following table:                                     Fail            50-64%         65-79%               80-100%          1975-76               9                  16                 26                       32          1976-77               6                  35                37                         8          1977-78               6                   28               20                         9 Are the grade distributions independence of year (class)? Drawyour conclusion using 0.01 level of significance.

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The grade distributions of a Stats class (final mark) forthree previous years ar

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