2etet ofWe have created a function named calculate_stats, whose output is a tuple.Depending on whether "NaN" (not a number) values are or not present, it produces 5 or 4 values. They are:(min, max, [number of empty values], mean, std)If we run:a, b, c = calculate_stats(dataset)Which statement is true:Select one or more:a.a and c will always get only the min and std values respectively.b.None of the aboveC.b will always be a tuple of 2 or more elements.d.b will only contain the number of NaNs when calculate_stats produces 5 elements and nothing otherwise.

Answered: of We have created a function named…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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We have created a function named calculate_stats, whose output is a tuple.
Depending on whether "NaN" (not a number) values are or not present, it produces 5 or 4 values. They are:
(min, max, [number of empty values], mean, std)
If we run:
a, b, c = calculate_stats(dataset)
Which statement is true:
Select one or more:
a.
a and c will always get only the min and std values respectively.
b.
None of the above
C.
b will always be a tuple of 2 or more elements.
d.
b will only contain the number of NaNs when calculate_stats produces 5 elements and nothing otherwise.

Expert Solution

Step 1

c. b will always be a tuple of 2 or more elements.

d. b will only contain the number of NaNs when calculate_stats produces 5 elements and nothing otherwise.

Explanation:

The function calculate_stats produces a tuple of 5 or 4 values, depending on whether "NaN" (not a number) values are present or not. If "NaN" values are present, the tuple will contain the 5 values: (min, max, [number of empty values], mean, std). Otherwise, it will contain only 4 values: (min, max, mean, std).
The variable a will always be assigned the minimum value because it is the first element in the tuple. The variable c will always be assigned the standard deviation value because it is the last element in the tuple. The variable b will always be assigned a tuple of 2 or more elements because it is using the unpacking operator. The variable b will only contain the number of NaNs when calculate_stats produces 5 elements and nothing otherwise because that is the only time that information is provided in the tuple.

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