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Engineering Data Analysis: Introduction to Statistics Quiz

16 Questions

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Engineering Data Analysis: Introduction to Statistics Quiz

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Questions and Answers

What is the main challenge in drawing conclusions from the results of an experiment?

Lack of proper equipment for data analysis

Inability to collect sufficient data

Overreliance on statistical methods

Random variation in scientific data (correct)

How do scientists and engineers use statistics?

To collect maximum data for analysis

To design valid experiments and draw reliable conclusions (correct)

To eliminate random variation in data

To rely solely on experimental results

What is the basic idea behind statistical methods of data analysis?

To ensure 100% accuracy in all experiments

To make inferences about a population by studying a relatively small sample (correct)

To collect as much data as possible

To negate the need for scientific experiments

Which type of study involves collecting engineering data through observation?

Observational study Signup and view all the answers

In which engineering problem-solving method are thermal sciences such as thermodynamics and heat transfer employed?

Thermal sciences Signup and view all the answers

What do statistical methods of data analysis allow scientists and engineers to do?

Design valid experiments and draw reliable conclusions Signup and view all the answers

What is the specification for the diameter of the balls?

0.65 ± 0.03 cm Signup and view all the answers

How many balls did the machine make during the last hour?

2000 balls Signup and view all the answers

What percentage of the random sample of 80 balls met the specifications?

90% Signup and view all the answers

What is inferential statistics used for?

To make predictions from data analysis Signup and view all the answers

What is a sample?

A subset of a population, containing observed objects or outcomes Signup and view all the answers

What is a conceptual population?

A population where all values that might possibly occur have been observed from a simple random sample Signup and view all the answers

What is a simple random sample?

A method in which each collection of n population items is equally likely to comprise the sample Signup and view all the answers

What is the fairest way to choose the winners in a lottery consisting of 10,000 tickets with 5 winners?

Choose tickets with numbers ending in an even digit Signup and view all the answers

What does descriptive statistics describe?

The basic features in the study using charts, graphs, plots, etc. Signup and view all the answers

What is a tangible population?

A population consisting of actual physical objects that are countable and always finite Signup and view all the answers