Please enable JavaScript.
Coggle requires JavaScript to display documents.
DS Interview Prep. (DS (5 steps to make Decision Tree (1 Enter all the…
Logical Q
2 buckets: 3L,5L. Measure 4L?
9 balls with one heavier, how many min weighting? 2 weightings
What is the angle between Hour and Minute hands of a clock when the time is half past six? 1hr 360/12=30 1 min 360/60=6 Answer min hand 30x6 =180, hr hand 6.5 x30 = 195 the difference 195-180 = 15 degrees
if it rains in Sat prob .6 and Sun .2 what is the weekend probability? Tot probability - (not rain Sat) x (not rain Sun)
Drawer with 12 red socks, 16 white, and 10 green how many draws you need to make a pair of socks? The colors +1
Statistics
Logistic Regressions measure relationship between dependent variable and one or more independent variables by estimating probabilities using logistic function (sigmoid)
-
Univariate: discover patterns in 1 variable. Mean, median, mode dispersion, range...etc
-
Multivariate: describe, relationships, predict, pos scriptive
What are the feature selection methods for the right variable? clean data , pre processing
-
-
-
-
How to treat outlier?
-
Try different model, maybe non linear
-
-
DS
Learning Types
Supervised
-
-
Used in Decision trees, logistic regressions, support vector machine
Unsupervised
Used in k-means, clustering, hierarchical clustering, priori algorithm
-
-
-
-
-
-
-
-
-
-
-
-
Classification model with 96% on cancer , why shouldn't be happy? what can you do?
-
-
-
The entropy of target variables [0,0,0,1,1,1,1,1]? -5/8 Log 5/8 + 3/8 log(3/8)
what is the most applicable algorithm to Predict the probability of death from heart disease using the 3 factors : age, gender cholesterol level? Logistic Regressions
-
-
-
-
-
-
Case
-
show structure Ex. Synergy, capabilities , growth
-
-
-
-