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measurement reliability MCQ Questions for Class 9

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2 questions tagged with measurement reliability.

Question 1/2 Expert Science Exploration: Entering the World of Secondary Science Hypothesis and experimentation Class 9 Level 8

किस कथन में प्रयोगात्मक परिणाम की अनिश्चितता सही व्यक्त की गई है?

Which statement correctly expresses uncertainty in an experimental result?

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Correct Answer

A. औसत लंबाई (15.2) सेमी थी और पुनरावृत्त मापों में लगभग (0.3) सेमी का फैलाव थाThe mean length was (15.2) cm with a spread of about (0.3) cm across repeated measurements

Step 1

Concept

Reporting spread with the mean gives an honest indication of measurement reliability. Include uncertainty with results.

Step 2

Why this answer is correct

The correct answer is A. औसत लंबाई (15.2) सेमी थी और पुनरावृत्त मापों में लगभग (0.3) सेमी का फैलाव था / The mean length was (15.2) cm with a spread of about (0.3) cm across repeated measurements. Reporting spread with the mean gives an honest indication of measurement reliability. Include uncertainty with results.

Step 3

Exam Tip

औसत के साथ फैलाव बताना मापन की विश्वसनीयता का ईमानदार संकेत देता है। परीक्षा में परिणाम के साथ अनिश्चितता लिखें।

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Question 2/2 Hard Science Exploration: Entering the World of Secondary Science Scientific questions and observations Class 9 Level 5

यदि तीन मापों के मान बहुत अलग हों तो केवल औसत निकालना पर्याप्त क्यों नहीं है?

Why is calculating only the average insufficient when three measurements differ greatly?

Explanation opens after your attempt
Correct Answer

A. भिन्नता संभावित त्रुटि या अस्थिरता का संकेत दे सकती हैVariation may indicate error or instability

Step 1

Concept

Large variation requires investigation of its cause. Examine data spread along with the average.

Step 2

Why this answer is correct

The correct answer is A. भिन्नता संभावित त्रुटि या अस्थिरता का संकेत दे सकती है / Variation may indicate error or instability. Large variation requires investigation of its cause. Examine data spread along with the average.

Step 3

Exam Tip

बहुत अधिक अंतर के कारण की जाँच आवश्यक है। परीक्षा में औसत के साथ डेटा का फैलाव भी देखें।

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