a quartile of

USAGE SUMMARY

The phrase "a quartile of" is correct and usable in written English.
It can be used when discussing statistical data, particularly in the context of dividing a dataset into four equal parts. Example: "The first quartile of the dataset indicates that 25% of the values fall below this point."

✓ Grammatically correct

Science

Human-verified examples from authoritative sources

Exact Expressions

6 human-written examples

Stratification of percent inhibition P2Y12 isolated a quartile of clopidogrel nonresponders (inhibition P2Y12 <15%) with significantly higher incidence of PMI (44% vs 15%, odds ratio 4.6, 95% confidence interval 1.9 to 11.5, p = 0.001).

The American Journal of Cardiology

Each respondent was then assigned to a quartile of each indicator, based on his/her neighborhood of residence.

BMC Public Health

First, we converted the NAI or testing scores to ordered categorical variables in four levels (excellent, good, not bad, and bad), each corresponding to a quartile of distribution of the NAI or testing score.

Environmental Health Perspectives

To permit blinding combined with flexible-dose regimens in the CATIE study, drug doses representing a quartile of the maximal daily drug dose were packaged in 4 capsules that were identical-appearing for all study drugs.

BMC Psychiatry

The strength of association for the negatively influencing comorbidities was similar to that of a reduction in LV-EF of 10% (which corresponds to a quartile of the distribution for this parameter in our cohort), with widely overlapping confidence intervals.

Clinical Research in Cardiology

For example, in the Rahier article, the β-cell fractional area of the pancreas was measured by manual point counting a quartile of sections obtained from the body and tail of the pancreas, whereas in the current study, the fractional β-cell area was measured in the entirety of sections from the tail by an automated image analysis system.

Diabetes Care

Human-verified similar examples from authoritative sources

Similar Expressions

54 human-written examples

Summary of the a) quartiles of the number of cattle processed, b) quartiles of the number of weeks at least one bovine animal was processed, c) annual OMAFRA audit rating, and d) median sales price of calves, cows, heifers, steers 2001 2007 for portion condemnations.

BMC Veterinary Research

Summary of the a) quartiles of the total number of cattle processed, b) quartiles of the number of weeks at least one bovine animal was processed, c) annual OMAFRA audit rating, and d) median sales price of calves, cows, heifers and steers 2001-2007.

BMC Veterinary Research

First edition of BI-RADS classification described four categories of density patterns, but later 2003 edition define them based on quantitative criteria as a quartiles of density percentages [ 8, 9].

BMC Cancer

Briefly, for each antibody patients whose antibody levels were in the first, second, third and fourth quartile of the distribution were assigned a quartile score of 1, 2, 3 or 4, respectively.

Plosone

The range was from 1 to 34, with an arithmetic mean of 7.54, a lower quartile of 4, a median of 5, and an upper quartile of 8 9.

BMC Medical Ethics

Expert writing Tips

Best practice

When using "a quartile of", ensure the context clearly indicates that you are referring to one of four equal groups into which a population or dataset is divided. This term is most effective when discussing statistical distributions or rankings.

Common error

Avoid using "a quartile of" when you actually mean another division, such as a decile (tenths) or a percentile (hundredths). Quartiles specifically refer to divisions into four equal parts. Ensure you're using the right statistical term to avoid misleading your audience.

Linguistic Context

The phrase "a quartile of" functions as a quantifier or determiner, specifying a particular segment of a distribution or dataset. This is supported by Ludwig's examples, which show the phrase being used to identify portions of populations or measurements.

Expression frequency: Uncommon

Frequent in

Science

100%

Less common in

News & Media

23%

Formal & Business

0%

Wiki

6%

Ludwig's WRAP-UP

In summary, the phrase "a quartile of" is a grammatically correct phrase primarily used in formal and scientific contexts. Ludwig AI's analysis indicates its function as a quantifier, used to specify a range within a dataset, and Ludwig’s examples confirm its use in statistical or analytical studies. While "a quartile of" may sometimes be interchanged with "a quarter of", the former is more accurate within the field of statistics.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

one quarter of

Uses a simpler numerical fraction instead of the statistical term 'quartile'.

25 percent of

Expresses the same proportion using percentage instead of quartile.

a segment representing 25% of

Rephrases it to emphasize the segment of a whole.

a fourth part of

Replaces 'quartile' with its direct equivalent in terms of division.

the lower quarter of

Specifies the position of the quartile (assuming it's the first).

the upper quarter of

Specifies the position of the quartile (assuming it's the fourth).

the bottom 25% of

Uses percentage to define the range from the bottom.

the top 25% of

Uses percentage to define the range from the top.

a division into quarters of

Emphasizes the action of dividing into four parts.

a portion constituting 25% of

Describes the portion as being equal to 25 percent.

FAQs

How is "a quartile of" used in statistical analysis?

In statistical analysis, "a quartile of" refers to one of the four equal groups into which a dataset is divided. These are typically the first quartile (25th percentile), the second quartile (50th percentile or median), and the third quartile (75th percentile). Understanding quartiles helps in analyzing the distribution and spread of data.

What's the difference between "a quartile of" and "a percentile of"?

"A quartile of" divides data into four equal parts, representing 25% increments. In contrast, "a percentile of" divides data into 100 equal parts, each representing 1%. Thus, quartiles are specific points (25th, 50th, 75th percentiles), while percentiles provide a finer-grained division of data.

Can I use "a quarter of" instead of "a quartile of"?

While "a quarter of" can sometimes be used interchangeably with "a quartile of", the latter is more precise in statistical contexts. "A quarter of" simply means one-fourth, whereas "a quartile of" specifically relates to the division of a dataset into four equal groups for statistical analysis. Using "one quarter of" could be appropriate in more general contexts.

How do I interpret data described using "a quartile of"?

When data is described using "a quartile of", it means the dataset has been split into four equal segments. If something is described as being in the 'lowest quartile', it falls within the bottom 25% of the data. Similarly, the 'highest quartile' refers to the top 25%.