(1) Please calculate the correlation coefficient between economics scores and statistics scores.

題組內容

Session 3 (50%)
1. The economics score (X) and statistics score (Y) of a school's international business graduate school enrollment are shown in the table below: Now it has been obtained: (10 %)
Now ΣX=202, ΣY=336, ΣX²=9,462, ΣY²=22,870, ΣXY=14,185 have been obtained.

2. The patrol police at the Shulin Station on the second highway want to know if the average speed of the truck is too high. Today, 81 trucks were randomly selected to measure their speed, and found that the average speed was 105 kilometers per hour and the standard deviation was 6 kilometers per hour, and it was assumed that the population obeyed the normal distribution. Please answer the following question: Does the average speed of a truck exceed 100 kilometers per hour under a significant level of 0.05? (Please write the null hypothesis and the opposing hypothesis, then calculate the statistic value and P value, respectively, and explain your statistical results). (15 %)

題組內容

(1) Please calculate the correlation coefficient between economics scores and statistics scores.

相關申論題

相關試卷