Question

thorough knowledge of statistics is essential to draw a____
A diagram
B graph
C pictogram
D demand curve​

Answer 1

Answer:

graphs because in statasics we can learn more about bar graphs

Answer 2

Answer:

Analytics Vidhya - Learn everything about Analytics

BEGINNER

BUSINESS ANALYTICS

BUSINESS INTELLIGENCE

CAREER

SKILLTEST

STATISTICS

41 questions on Statistics for data scientists & analysts

DISHASHREE GUPTA, MAY 4, 2017 LOGIN TO BOOKMARK THIS ARTICLE Click to Download PDF

Introduction

Statistics forms the back bone of data science or any analysis for that matter. Sound knowledge of statistics can help an analyst to make sound business decisions.

On one hand, descriptive statistics helps us to understand the data and its properties by use of central tendency and variability. On the other hand, inferential statistics helps us to infer properties of the population from a given sample of data. Knowledge of both descriptive and inferential statistics is essential for an aspiring data scientist or analyst.

To help you improve your knowledge in statistics we conducted this practice test. The test covered both descriptive and inferential statistics in brief. I am providing the answers with explanation in case you got stuck on particular questions.

In case you missed the test, try solving the questions before reading the solutions.

Overall Scores

Below are the distribution scores, they will help you evaluate your performance.

You can access the final scores here. More than 450 people took this test and the highest score obtained was 37. Here are a few statistics about the distribution.

Mean Score: 20.40

Median Score: 23

Mode Score: 25

Questions & Solution

1) Which of these measures are used to analyze the central tendency of data?

A) Mean and Normal Distribution

B) Mean, Median and Mode

C) Mode, Alpha & Range

D) Standard Deviation, Range and Mean

E) Median, Range and Normal Distribution

2) Five numbers are given: (5, 10, 15, 5, 15). Now, what would be the sum of deviations of individual data points from their mean?

A) 10

B)25

C) 50

D) 0

E) None of the above

3) A test is administered annually. The test has a mean score of 150 and a standard deviation of 20. If Ravi’s z-score is 1.50, what was his score on the test?

A) 180

B) 130

C) 30

D) 150

E) None of the above

4) Which of the following measures of central tendency will always change if a single value in the data changes?

A) Mean

B) Median

C) Mode

D) All of these