(نتيجة إحصائية تشير إلى تقلص حجم الكتلة الخبيثة)

انحسار حجم الكتلة الخبيثة في الثدي الأيسر وفقًا للفاصل الزمني / انحسار حجم الكتلة الخبيثة في الثدي الأيسر بين نقطتي قياس

"As we already know, estimates of the regression coefficients β0 and β1 are subject to sampling uncertainty, see Chapter 4. Therefore, we will never exactly estimate the true value of these parameters from sample data in an empirical application. However, we may construct confidence intervals for the intercept and the slope parameter.
A 95% confidence interval for βi has two equivalent definitions:
The interval is the set of values for which a hypothesis test to the level of 5% cannot be rejected.
The interval has a probability of 95% to contain the true value of βi. So in 95% of all samples that could be drawn, the confidence interval will cover the true value of βi.We also say that the interval has a confidence level of 95%"
https://www.econometrics-with-r.org/5.2-cifrc.html

"We try to find an interval size that will best display the histogram. A histogram displays numerical data by grouping data into “bins” of equal width. Each bin is plotted as a bar whose height corresponds to how many data points are in that bin . Bins are also sometimes called “intervals”, “classes”, or “buckets”."


"Interval data cannot be multiplied or divided, however, it can be added or subtracted. Interval data is measured on an interval scale. A simple example of interval data: The difference between 100 degrees Fahrenheit and 90 degrees Fahrenheit is the same as 60 degrees Fahrenheit and 70 degrees Fahrenheit.

In market research or in any other forms of social, economic or business research interval data plays a pivotal role. What makes interval data so popular and in-demand is because interval data supports almost all statistical test and transformations in obtaining quantitative data."
https://www.questionpro.com/blog/interval-data/

"Class interval size = Upper class limit – Lower class limit
Class interval size = 40 – 31 = 9
Therefore, the size of the class interval is 9."
https://byjus.com/maths/statistics-for-class-10/