Need help with the following 3 questions: For #16, since its multi-select its either b) or d) or maybe just d) only. Abo
Posted: Wed May 11, 2022 3:49 pm
Need help with the following 3 questions:
For #16, since its multi-select its either b) or d) or maybe
just d) only. About 70% sure its just K-means, but PCA might be
unsupervised.
#18, not sure
#20, its a split between b) c) or d) don't think its a)
Please provide an explanation with your answers as to why you
chose that option.
Question 16 (4 points) Which ones of the following are unsupervised learning algorithms. [Multi-Select Question] K-Nearest Neighbors Principle Component Analysis Linear regression OK-Means Clustering
Question 18 (4 points) Rescale each of the three observations by normalization. No values 1 5 2 20 3 50 No 1: 0, No 2: 0.5, No 3: 1 No 1: 0.1, No 2:0.5, No 3: 1 1, 3: 1 No 1: 0.1, No 2: 0.3, No 3: 0.9 No 1: 0, No 2: 0.3, No 3: 1
Question 20 (4 points) The mtcars data set have gears variable representing the number of gears (3, 4 or 5) in a vehicle. Modeling mpg (miles per gallon) depending on the number of gears in a vehicle gives following output; Im(formula = mpg - gears, data = mtcars) Residuals: Min 1Q Median 30 Max -6.7333-3.2333 -0.9067 2.8483 9.3667 Coefficients: Estimate (Intercept) 16.107 gears4 8.427 gears5 5.273 Std. Error 1.216 1.823 2.431 t value 13.250 4.621 2.169 Pr(>ltl) 7.87e-14 *** 7.26e-05 0.0384 *** Signif. codes: O'***' 0.001 '**' 0.01 '*' 0.05 0.1''1 Residual standard error: 4.708 on 29 degrees of freedom Multiple R-squared: 0.4292, Adjusted R-squared: 0.3898 F-statistic: 10.9 on 2 and 29 DF, p-value: 0.0002948 What is the null hypothesis for the ANOVA test (F-statistic) in the model. None of the above The variance of different vehicles grouped by gears is equal to zero. The coefficients of gears3, gears4 and gears5 are zero. The variance of mpg of different vehicles grouped by gears is equal to zero.
- Need Help With The Following 3 Questions For 16 Since Its Multi Select Its Either B Or D Or Maybe Just D Only Abo 1 (24.93 KiB) Viewed 56 times
- Need Help With The Following 3 Questions For 16 Since Its Multi Select Its Either B Or D Or Maybe Just D Only Abo 2 (24.47 KiB) Viewed 56 times
- Need Help With The Following 3 Questions For 16 Since Its Multi Select Its Either B Or D Or Maybe Just D Only Abo 3 (91.32 KiB) Viewed 56 times
just d) only. About 70% sure its just K-means, but PCA might be
unsupervised.
#18, not sure
#20, its a split between b) c) or d) don't think its a)
Please provide an explanation with your answers as to why you
chose that option.
Question 16 (4 points) Which ones of the following are unsupervised learning algorithms. [Multi-Select Question] K-Nearest Neighbors Principle Component Analysis Linear regression OK-Means Clustering
Question 18 (4 points) Rescale each of the three observations by normalization. No values 1 5 2 20 3 50 No 1: 0, No 2: 0.5, No 3: 1 No 1: 0.1, No 2:0.5, No 3: 1 1, 3: 1 No 1: 0.1, No 2: 0.3, No 3: 0.9 No 1: 0, No 2: 0.3, No 3: 1
Question 20 (4 points) The mtcars data set have gears variable representing the number of gears (3, 4 or 5) in a vehicle. Modeling mpg (miles per gallon) depending on the number of gears in a vehicle gives following output; Im(formula = mpg - gears, data = mtcars) Residuals: Min 1Q Median 30 Max -6.7333-3.2333 -0.9067 2.8483 9.3667 Coefficients: Estimate (Intercept) 16.107 gears4 8.427 gears5 5.273 Std. Error 1.216 1.823 2.431 t value 13.250 4.621 2.169 Pr(>ltl) 7.87e-14 *** 7.26e-05 0.0384 *** Signif. codes: O'***' 0.001 '**' 0.01 '*' 0.05 0.1''1 Residual standard error: 4.708 on 29 degrees of freedom Multiple R-squared: 0.4292, Adjusted R-squared: 0.3898 F-statistic: 10.9 on 2 and 29 DF, p-value: 0.0002948 What is the null hypothesis for the ANOVA test (F-statistic) in the model. None of the above The variance of different vehicles grouped by gears is equal to zero. The coefficients of gears3, gears4 and gears5 are zero. The variance of mpg of different vehicles grouped by gears is equal to zero.