Z_0.05=1.65, Z_0.025=1.96, _0.05,5^2=11.07, _0.05,6^2=12.59, _0.05,7^2=14.071. A dice is thrown 90 times. Different faces occurred 11, 17, 20, 15, 13, 14 times, respectively. Test whether the dice is balanced. (10 points)

2. Two random samples of 8 and 11 plots are chosen independently from two distant places. The yields of maize obtained from these plots are given below. Test whether the average maize yield is same for two places. (15 points)First place: 12, 15, 16, 11, 13, 13, 14, 15Second place: 15, 22, 12, 25, 18, 19, 20, 17, 25, 24, 18

\( Z_{0.05}=1.65, Z_{0.025}=1.96, \chi_{0.05,5}^{2}=11.07, \chi_{0.05,6}^{2}=12.59, \chi_{0.05,7}^{2}=14.07 \)

1. A dice is thrown 90 times. Different faces occurred 11, 17, 20, 15, 13, 14 times, respectively. Test whether the dice is balanced. (10 points)

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\( Z_{0.05}=1.65, Z_{0.025}=1.96, \chi_{0.05,5}^{2}=11.07, \chi_{0.05,6}^{2}=12.59, \chi_{0.05,7}^{2}=14.07 \)1. A dice is thrown 90 times. Different faces occurred 11, 17, 20, 15, 13, 14 times, respectively. Test whether the dice is balanced. (10 points)

相關申論題

相關試卷

\( Z_{0.05}=1.65, Z_{0.025}=1.96, \chi_{0.05,5}^{2}=11.07, \chi_{0.05,6}^{2}=12.59, \chi_{0.05,7}^{2}=14.07 \)

1. A dice is thrown 90 times. Different faces occurred 11, 17, 20, 15, 13, 14 times, respectively. Test whether the dice is balanced. (10 points)