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Q: What do you mean positive temperature co-efficient and negative temperature co-efficient of temperature?
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What does the acronym PTC mean?

1) Positive Temperature Coefficient 2) Positive Train Control.


Why do conductor have a positive coefficent?

You mean positive temperature coefficient? Yes conductors as they get heated then due to the nucleii vibrating with greater amplitude would have a grip over the moving electrons and so the resistivity increases with the increase in temperature. Hence positive temperature coefficient.


Is it possible for a coefficient of variation to be negative?

Of course it is! If the mean of a set of data is negative, then the coefficient of variation will be negative.


Is it possible for a coefficient of variation to be negative Explain.?

Of course it is! If the mean of a set of data is negative, then the coefficient of variation will be negative.


What is coefficient of skewness in a variable concentration?

A measure of skewness is Pearson's Coefficient of Skew. It is defined as: Pearson's Coefficient = 3(mean - median)/ standard deviation The coefficient is positive when the median is less than the mean and in that case the tail of the distribution is skewed to the right (notionally the positive section of a cartesian frame). When the median is more than the mean, the cofficient is negative and the tail of the distribution is skewed in the left direction i.e. it is longer on the left side than on the right.


What does negative answer mean?

its negative! negative reply, answer that is not positive


Do withdrew mean positive or negative?

positive


Can the sample mean in statistics be either positive or negative?

It can have either a negative or positive trend


Can you have a negative coefficient in a direct variation?

Yes, you can have a negative coefficient in a direct variation. So if you had y = -7x, that would be a direct variation. If you have y = -x, I do not know, if that is what you mean. Hope it helped.


What is a negative mean?

IN statistics yes there is a negative mean. Mean is the average of multiple numbers. Negative is opposite of positive.


A negative plus a positive equels?

A negative or a positive! It depends on the question.EXAMPLES-7 + 3 = -4 ( a negative answer)-7 + 8 = 1 (a positive answer)IF you mean a negative times a positive, the answer is negative:-3 x 5 = -15


What is the different between positive and negative decibel?

Negative decibels mean damping (loss) and positive decibels mean amplification (gain).