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Questions tagged [rounding]

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Rounding numbers in a $\chi^2$ test

I wanted to ask about rounding numbers in my $\chi^2$ test for discrete real-world values. Sadly, teacher wants to see if I was tossing my coin fairly (and by my own hand) for a previous statistics ...
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0answers
24 views

Why do we round up the Standard Deviation when it rounds regularly to 0? [closed]

Why do we round up the Standard Deviation when it rounds regularly to 0? For instance, if our SD is 0.02, we round it up to 0.1, but if it is 0.06, we keep it at 0.06. Can someone please explain? ...
4
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1answer
378 views

Given the results, how many people were surveyed?

Without specifying how many responses were summarized in the graphic, the newspaper, The Guardian, today published these survey results: Source: https://www.theguardian.com/film/2018/mar/01/what-is-...
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1answer
44 views

regression with rounded covariates

A basic assumption of something as simple as OLS regression is that the covariates are continuous. Often this is only partly the case, e.g. heart rate is often reported in integer number of bpm, yet ...
1
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1answer
72 views

Impact of rounding a variable to the nearest unit

I have created composite variables after a factor analysis. The original variables were categorical (levels 1-7) and the composites were created by averaging the items loading into each factor. I ...
2
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2answers
2k views

Number of significant figures to report for a confidence interval

I'm a TA in stat for med students and when discussing confidence intervals together with the one-sample t-test, I got doubts on the decimals that should be retained. Specifically, we tested a data ...
4
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1answer
38 views

Quantiles of rounded up values and rounded up quantiles

I am currently working with a rounded up values of continuous distribution and I am trying to find out some of its general properties. I have the following model: $y = \lceil x \rceil$ where $x$ has ...
3
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1answer
638 views

What to do with a lmer model that violates the assumptions of normal residuals?

I have the following lmer model: ...
1
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1answer
263 views

How do you handle probability zero for states due to rounding error in an HMM?

Say I have a hidden Markov model (HMM), and due to the emission distribution and our observations, we get probability 0 for certain states due to computer precision, which causes singularities (divide ...
2
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2answers
8k views

Round to Even Rule

The standard practice for rounding numbers appears to include the "round to even" rule for cases where the digit to the right of the least significant digit is equal to 5. Here is an example from ...
4
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2answers
263 views

Does rounding introduce variance into estimates?

It is often recommended to round parameter estimates to avoid suggesting more precision than the data really have, e.g. here. I understand rounding does not introduce bias, as long as an unbiased ...