Statistics for Data Analyst - Statistics MCQs, Analysis, Software

Quiz Data Analytics 5

Feb 14, 2025Feb 14, 2025 by Muhammad Imdad Ullah

The post is about Quiz Data Analytics. There are 20 multiple-choice type questions related to “The Data Ecosystem and Languages for Data Professionals” covering the Languages related to the work of data professionals such as type of data, format of data, audience, query languages, programming languages, and shell scripting. Let us start with the Quiz Data Analytics Questions now.

Quiz Data Analytics with Answers

Which file format is independent of software, hardware, and operating systems and can be viewed the same way on any device?
Which data source can return data in plain text, XML, HTML, or JSON?
What is the next step must you perform after you download a dataset file from a URL?
“A presentation is not a data dump”. What is the one thing you would do to ensure your presentation is not a data dump?
What can you do to help your audience trust you?
What data type is data from emails, XML, zipped files, binary executables, and TCP/IP protocols?
Why is it important to understand the underlying data that was used to generate a data set in the context of reliability?
Why is it important to understand the information needs of your audience?
Which of the programming languages supports multiple programming paradigms, such as object-oriented, imperative, functional, and procedural, making it suitable for a wide variety of use cases?
What are the requirements for data to be reliable?
What type of data is produced by wearable devices, smart buildings, and medical devices?
What type of data is semi-structured and has some organizational properties but not a rigid schema?
What is one of the common structural transformations used for combining data from one or more tables?
What does a typical data-wrangling workflow include?
What is one of the steps in a typical data-cleaning workflow?
When applying for a data science position, you may be tested on basic linear algebra and multivariable calculus.
Most data visualization solutions provide users with a wide range of opportunities for data analytics, interpretation, exploration, and application.

Computer MCQs Online Test

Statistics Help itfeature.com Quiz Data Analytics with Answers

MCQs Introduction to Statistics 21

Feb 13, 2025Feb 13, 2025 by Muhammad Imdad Ullah

The post is about MCQs introduction to Statistics. There are 20 multiple-choice questions in this quiz related to data, variables, measures of central tendencies, measures of dispersions, level of measurements, and measures of positions. Let us start with the MCQs Introduction to Statistics Quiz.

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Online MCQs Introduction to Statistics

A researcher wants to measure physical height in as much detail as possible. Which level of measurement does s/he employ?
Suppose a researcher conducted a study on eye color and 550 people are questioned about it. 110 of them have brown eyes and 44% of them have blue eyes. What percentage of the people you questioned have blue or brown eyes?
Ten students completed an exam. Their scores were: 5, 7, 2, 1, 3, 4, 8, 8, 6, 6. What is the interquartile range (IQR)?
A researcher wants to know what people think of football. He asks ten people to rate their attitude towards football on a scale from 0 (do not like football at all) to 10 (like football a lot). The ratings from ten people are as follows: 1, 10, 6, 9, 2, 5, 6, 6, 5, 10. What is the standard deviation?
Which of the following statements is true? I. The larger the variance, the smaller the standard deviation. II. The stronger the skew, the smaller the difference between the median and the mean.
The grades for a statistics exam are as follows: 3, 5, 5, 6, 7.5, 6, 5, 1, 10, 4. Which score is an outlier? Use the interquartile range (IQR).
How many goals have the top strikers in a football competition scored? For the following 10 strikers, the information obtained is: 12, 10, 11, 12, 11, 14, 15, 18, 21, 11. The (1) ———— of the dataset equals 12, the mean equals (2) ———–, and the (3) ————– equals 11. The standard deviation equals (4) ———— Fill in the right words/numbers.
What is true about a variance of zero?
What is the difference between variables and constants?
A population mean is a center of mass of what?
A sample mean is a center of mass of what?
A population mean estimates a sample mean.
A sample mean is unbiased.
The more data that goes into the sample mean, the more concentrated its density/mass function is around the population mean.
What type of data refers to information obtained directly from the source?
Data obtained from an organization’s internal CRM, HR, and workflow applications is classified as:
When you detect a value in your data set that is vastly different from other observations in the same data set, what would you report that as?
The height of a student is 60 inches. This is an example of ——————?
If a Curve has a longer tail to the right, it is called
The extent to which values are dispersed around central observation is considered as

MCQs Introduction to Statistics with Answers

Computer MCQs Online Test

Probability MCQs Questions 12

Feb 16, 2025Feb 12, 2025 by Muhammad Imdad Ullah

The post is about the Online Probability MCQs Questions. There are 20 multiple-choice questions covering topics related to random experiments, random variables, probability, classical and empirical probability, rules of probability (addition and multiplication rule), conditional probability, events, types of events, and sample space. Let us start with the Probability MCQs Questions Quiz.

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Online Probability MCQs Questions with Answers

What is the probability of getting two heads when two coins are tossed/flipped?
The probability of getting a double by rolling TWO six-sided dice (with sides labeled as 1, 2, 3, 4, 5, 6) is:
You roll a dice five times. The outcomes are: 6, 6, 6, 6, 6. Then you repeat this and you find: 1, 4, 3, 5, 2. Which of the following outcomes is most likely?
You ask a couple of people at the beach what they think about the seagulls. You propose to them the statement: Seagulls are annoying. Their responses are as follows: 20% Strongly Agree 13% Agree 12% Neutral 50% Disagree 5% Strongly Disagree What is the chance of a random person responding with ‘agree’ given that he/she is not neutral?
You ask some students which subject they prefer: statistics or English. There are a lot of people who love statistics ($B$) and a lot of people who love English ($C$). However, some people cannot make a decision and tell you that they like both subjects ($D$). Getting some insights about results, you realized that all the female students had a positive opinion about statistics ($A$). Which of these events ($A$, $B$, $C$, $D$) are disjoint?
Suppose, you collected four shells from a beach. It is known that there are only three types of shells on this beach, and these shells occur in equal amounts. How many different events are possible?
Twenty people take a statistics exam. Usman scored five out of ten and Ali scored eight out of ten. Every score (1 to 10) is equally likely. What is the chance of a random person out of the people who took the exam scoring higher than Usman, but lower than Ali?
How can we define probability or chance? MCQs General Knowledge
Suppose that you are rushing out to get to your appointment in 30 minutes. From experience, you know that most of the time you travel this distance in 30 minutes. However, half of the time there is heavy traffic. In the past, there has been heavy traffic and you have made it to your appointment within 30 minutes 34% of the time. You get out on the street and see that there is heavy traffic. What is the chance you will get to your appointment on time?
A pot has 100 balls. 20 of them are red, 50 are blue and 30 are green. You draw 5 balls from the pot without replacement. What is the probability of drawing five blue balls?
On a single train journey, there is a probability of 0.4 that your ticket will be checked. You make a return-journey, what is the probability that your ticket will be checked only once? R Programming Language
A pair of dice is rolled 20 times and record how often you get a total of 5 or 10. What is your best guess for the relative frequency that this event (a total of 5 or 10) occurs without seeing the actual data?
If $P(A \,\, and\,\, B)= P(A|B) \cdot P(B)$ then both events are
If the probability that event $A$ occurs is 0.51 and the probability that event $B$ occurs is 0.64. Both events $A$ and $B$ are statistically independent, then
If the probability that event $A$ occurs is 0.51 and the probability that event $B$ occurs is 0.64. The probability that both $A$ and $B$ occur is 0.23, then
If three boys are randomly selected, and the probability that they will all have birthdays in June is
Three dice are rolled. What is the probability of getting three 4s?
If $P(A\cap B)=\phi$ then $P(A\cup B)=$
Empirical probability is based on
Which of the two events are mutually exclusive?

R Programming Language, MCQs General Knowledge

MCQs Correlation and Regression 10

Feb 11, 2025Feb 11, 2025 by Muhammad Imdad Ullah

The post is about MCQs correlation and regression Quiz. There are 20 multiple-choice questions covering topics related to the basics of correlation and regression analysis, best-fitting trend, least square regression line, interpretation of correlation and regression coefficients, and regression plot. Let us start with the MCQs correlation and regression Quiz now.

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MCQs Correlation and Regression

Which of the following statement(s) about correlations is/are right? I. When dealing with a positive Pearson’s r, the line goes up. II. When the observations cluster around a straight line, we deal with a linear relation between the variables. III. The steeper the line, the smaller the correlation.
Suppose you have collected the following data about how much chocolate people eat and how happy these people are. Amount of chocolate bars a week: 2, 4, 1.5, 2, 3. Grades for happiness: 7, 3, 8, 8, 6. (Note that the data follows paired observations) The Pearson Correlation between these two variables will be
Suppose, you have investigated how eating chocolate bars influences the grades of students. For this purpose, you keep track of their chocolate intake (in bars per week) and assess their exam results one day later. Which statement(s) about the regression line $\hat{y} = 0.66x + 1.99$ is/are true?
A professor uses the following formula to grade a statistics exam: $\hat{y} = 0.5 + 0.53x$. After obtaining the results the professor realizes that the grades are very low, so he might have been too strict. He decides to level up all results by one point. What will be the new grading equation?
What is the explained variance? And how can you measure it?
A teacher asks his students to fill in a form about how many cigarettes they smoke every week and how much they weigh. After obtaining the data/results, he makes a scatterplot and analyses the data points. Pearson’s r is computed to assess the correlation and found to of 0.80. From the correlation results, it is concluded that smoking more cigarettes causes high body weight. What is wrong with this analysis?
What can you conclude about a Pearson’s r that is bigger than 1?
Why do we use squared residuals when computing the regression line?
What technique is used to help identify the nature of the relationship between two variables?
Regression is a form of this?
The correlation coefficient is used to determine
If there is a very strong correlation between two variables then the correlation coefficient must be
Regression modeling is a statistical framework for developing a mathematical equation that describes how
In the least squares regression, which of the following is not a required assumption about the error term $\varepsilon$?
In a regression analysis if $R^2=1$ then
In a regression analysis, the variable that is used to explain the change in the outcome of an experiment, or some natural process, is called
For a mathematical model related to a straight line, if a value for the x variable is specified, then
When a regression line passes through the origin then
The range of the multiple correlation coefficient is
In regression analysis, the variable that is being predicted is