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Quis Regression Statistic berserta jawaban
Typology: Quizzes
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Kurnia Ramadhan
The Quiz Materials are : a. Scatterplots and regression b. Correlation coefficient and the residual c. Coefficient of determination and RMSE (root mean square error) d. Chi-square tests
There appears to be a strong, positive, linear relationship between sea surface temperatures and time. There appears to be a strong, negative, linear relationship between sea surface temperatures and time. There appears to be a weak, positive, linear relationship between sea surface temperatures and time. There appears to be a weak, negative, linear relationship between sea surface temperatures and time.
∑xy = 522
Figure 1 Figure 2
Figure 3 Figure 4
An R-value close to 1 or −1 means the line of best fit is perfect at making predictions from your data, you do not need any other checks. Always draw a scatterplot of your data points first before you perform a linear regression to get an idea of the shape of the data. When you check the residual plot, it needs to be in a random pattern with points above and below 0 in order for the line of best fit to be a good predictor of the data. The value of a data point is always equal to the value from the linear model, plus the residual value.
... the model is probably a good fit. ... the model is probably a bad fit. ... the r2 value will decrease.
The university can’t use a chi-square test because their sample doesn’t meet the independence condition
Ordering an appetizer doesn’t affect the dessert order Ordering an appetizer affects the dessert order The restaurant can’t use a chi-square test because their sample doesn’t meet the large counts condition The restaurant can’t use a chi-square test because their sample doesn’t meet the independence condition
Sick days taken is not affected by quarter Sick days taken is affected by quarter The company can’t use a chi-square test because their sample doesn’t meet the large counts condition The company can’t use a chi-square test because their sample doesn’t meet the independence condition
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