Question

प्रश्न-3
सत्य अथवा
(अ) प्रकाश संश्लेषण में कार्बन डाइऑक्साइड मुक्त होती है।
(ब) अन्तःश्वसन के समय वक्ष-गुहा का आयतन बढ़ जाता है। (
(स) अम्ल स्वाद मे खटटे होते हैं। (Y
(द) मंड का पाचन आमाशय से प्रारंभ होता है। -
1​

Answer 1

Answer:

This is a classic example of finding mean and standard deviation using Z values.

From this page find the Z value corresponding to 31% area under the curve and 92% (100-8) percent area under the curve.

Math Is Fun Virtual Manipulative

Note: You'll probably be given tables to lookup in your quizzes.. they're a bit confusing. But you might as well learn how to use it.

As you know:

Z=X−μσZ=X−μσ

Put in X and Z values values twice, you'll have two linear equations. Solve them and the answer is yours!

Explanation:

This is a classic example of finding mean and standard deviation using Z values.

From this page find the Z value corresponding to 31% area under the curve and 92% (100-8) percent area under the curve.

Math Is Fun Virtual Manipulative

Note: You'll probably be given tables to lookup in your quizzes.. they're a bit confusing. But you might as well learn how to use it.

As you know:

Z=X−μσZ=X−μσ

Put in X and Z values values twice, you'll have two linear equations. Solve them and the answer is yours!

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