Exam Simulator: Data Analysis

Consider this dataset showing the retirement age of 11 people, in whole years:

54, 54, 54, 55, 56, 57, 57, 58, 58, 60, 60

This table shows a simple frequency distribution of the retirement age data.

Which of the following value is the measure of the central tendency “mode”?

Consider this dataset showing the retirement age of 11 people, in whole years:

54, 54, 54, 55, 56, 57, 57, 58, 58, 60, 60

Which of the following value is the measure of the central tendency “median”?

Consider this dataset showing the retirement age of 11 people, in whole years:

54, 54, 54, 55, 56, 57, 57, 58, 58, 60, 60

Which of the following value is the measure of the central tendency “mean”?

A data analyst wants to make a rough comparison of two graphs of variability, considering only the most extreme cases.

Which of the following measures of dispersion would effectively make the comparison?

Which of the following value is the measure of dispersion “range” between the scores of ten students in a test.

The scores of ten students in a test are 17, 23, 30, 36, 45, 51, 58, 66, 72, 77.

Which of the following measures of dispersion would help analysts to measure market and security volatility — and predict performance trends?

Suppose that we have observed the following n = 5 resting pulse rates: 64, 68, 74, 76, 78

Which of the following values is the variance of the resting pulse rates?

Which of the following statistical methods refers to the probability that a population parameter will fall between a set of values for a certain proportion of times?

Which of the following inferential statistical methods determine if there is a significant difference between the means of two groups?

Which of the following inferential statistical methods is a numerical measurement that describes a value’s relationship to the mean of a group of values?

Which of the following inferential statistical methods is a number describing how likely it is that your data would have occurred by random chance?

Which of the following inferential statistical methods is a statistical test used to compare observed results with expected results?

Τype I error is the mistaken rejection of the null hypothesis, also known as a “false positive”, while a type II error is the mistaken acceptance of the null hypothesis, also known as a “false negative”. (TRUE/FALSE)

A forecasting analyst wants to predict sales for a company based on weather, previous sales, and GDP growth.

Which of the following inferential statistical methods is MOST suitable for this case?

Which of the following data analytics tools can execute the following command?

INSERT INTO Companies (CompanyName, ContactName, Address, City, PostalCode, Country)
VALUES ('ExamsDigest', 'Nick G.', 'London St. 13', 'London', '45533', 'United Kingdom');

A junior web developer wants to develop a new eCommerce app using python for the back end, MongoDB for the database, and Vue.js for the front end. He wants to create a simple list called apparel with three lists items (“t-shirts, hoodies, jackets”).

Which of the following command does he need to type to create the list on Python?

A data analyst is looking for software that includes accounting and budgeting templates for easy use and built-in calculating and formula features to organize and synthesize results.

Which of the following data analytics tools is MOST suitable in this case?

An online payment company wants to develop a new fraud detection system to protect customers against disputes and fraudulent payments.

Which of the following data analytics tools is MOST suitable for developing the fraud detection system?

One of the benefits of using Amazon QuickSight is:

Which of the following data analytics tools is a cloud-based platform designed to provide direct, simplified, real-time access to business data for decision-makers across the company with minimal IT involvement?