Databricks Certified Professional Data Scientist Exam - Topic 2 Question 49 Discussion

Actual exam question for Databricks's Databricks Certified Professional Data Scientist exam

Question #: 49
Topic #: 2

[All Databricks Certified Professional Data Scientist Questions]

Question-26. There are 5000 different color balls, out of which 1200 are pink color. What is the maximum likelihood estimate for the proportion of "pink" items in the test set of color balls?

A2.4

B24 0

C.24

D.48

E4.8

Show Suggested Answer

Suggested Answer: C

In general, for a fixed set of data and underlying statistical model the method of maximum likelihood selects the set of values of the model parameters that maximizes the likelihood function. Intuitively, this maximizes the 'agreement' of the selected model with the observed data, and for discrete random variables it indeed maximizes the probability of the observed data under the resulting distribution. Maximum-likelihood estimation gives a unified approach to estimation, which is well-defined in the case of the normal distribution and many other problems. However in some complicated problems, difficulties do occur: in such problems, maximum-likelihood estimators are unsuitable or do not exist.

by Ozell at Nov 21, 2023, 07:57 PM

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Bobbie

3 months ago

How can there be 5000 balls and only 1200 pink? Sounds off.

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Daren

3 months ago

Yup, .24 makes total sense!

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Vesta

3 months ago

Wait, is it really that high?

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Charlesetta

4 months ago

Definitely going with .24!

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Daniela

4 months ago

The proportion of pink balls is 1200/5000.

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Vallie

4 months ago

I think the maximum likelihood estimate is straightforward, but I’m torn between .24 and .48. I need to be careful with my division!

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Lawrence

4 months ago

I feel like I need to double-check my calculations. If I recall correctly, the proportion is just the count of pink balls over the total.

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Annalee

4 months ago

This seems similar to a practice question we did on estimating probabilities. I think the answer might be .24, but I could be wrong.

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Alberto

5 months ago

I remember something about calculating proportions, but I'm not sure if I should divide 1200 by 5000 or something else.

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Elizabeth

5 months ago

This seems simple enough. The key is to remember that the maximum likelihood estimate is the proportion of the observed data. So the answer is .24.

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Gail

5 months ago

Wait, I'm not sure about this. Shouldn't we be considering the total number of different color balls? I'm going to have to review my notes on maximum likelihood estimation.

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Gilma

5 months ago

Hmm, I'm a bit confused. Is the maximum likelihood estimate the same as the proportion? I'll need to think this through carefully.

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Shayne

5 months ago

Okay, this looks like a straightforward probability question. I just need to find the proportion of pink balls out of the total number of balls.

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Matthew

5 months ago

I've got this! The maximum likelihood estimate is just the number of pink balls divided by the total number of balls. So the answer is .24.

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Alexia

5 months ago

This is a tricky one. I'm going to need to work through the math step-by-step to make sure I'm not missing anything.

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Marion

5 months ago

This looks like a straightforward question about automating email notifications based on file drops. I think the key is to identify the right Salesforce Marketing Cloud feature to handle this.

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