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Python Institute PCED - Certified Entry-Level Data Analyst with Python Sample Questions:

1. You are given the following list of daily step counts:
steps = [8230, 9020, 7640, 8760, 10020, 2546, 9817]
Your task is to calculate:
- the standard deviation of the step counts,
- the average rounded up to the nearest whole number, and
- the median of the step counts.
Which code snippet correctly performs all three tasks? Select the best answer.
import statistics

A) import math
print(statistics.variance(steps))
print(math.ceil(sum(steps) / len(steps)))
print(math.floor(statistics.median(steps)))
import statistics
B) import math
print(statistics.stdev(steps))
print(math.ceil(statistics.mean(steps)))
print(statistics.median(steps))
C) import math
print(statistics.stdev(steps))
print(round(math.mean(steps)))
print(math.median(steps))
import statistics
D) import math
print(math.stdev(steps))
print(statistics.mean(steps))
print(statistics.median(steps))
import statistics

2. A government agency collects citizen data for various public services.
What is the primary reason for emphasizing careful data management throughout the entire data lifecycle in this context? Select the best answer.

A) To guarantee the long-term availability and integrity of crucial citizen datasets for future policy formulation and evaluation.
B) To uphold data quality for effective service delivery, safeguard citizen privacy and prevent misuse, and comply with data protection laws.
C) To enable seamless sharing of anonymized citizen information with other governmental bodies for collaborative initiatives.
D) To streamline the initial capture of citizen details and minimize the administrative burden on both staff and the public.

3. You are given two lists representing daily page views and sign-ups on a website:
views = [120, 130, 128, 700, 115, 123, 119, 680, 122]
signups = [12, 15, 13, 50, 11, 14, 10, 55, 13]
You want to:
- remove outliers (views > 600), and
- calculate correlation between the cleaned lists.
Which code accomplishes this correctly? Select the best answer.

A)

B)

C)

D)

4. A program uses slicing on a string "Python". The expression s[1:4] is evaluated. Which substring will be returned?

A) ytho
B) tho
C) yth
D) ythn

5. You are reviewing a report that compares the number of weekly client meetings and project completion rates across teams. The table below summarizes the data for each team:

Which statement best describes the data shown above? Select the best answer.

A) "Teams with 5-6 weekly meetings tended to complete more projects than those with very high or very low meeting counts."
B) The more meetings a team had, the more projects they finished, especially in high-performing teams like Omega and Delta."
C) "Project completion numbers were nearly identical across all teams, averaging 3.25 per month."
D) "Gamma and Omega were outliers that inflated the meeting average, but most teams finished about 3 projects per month."

Solutions: