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Этот калькулятор сейчас показан на английском, пока готовится его перевод.

Статистика и вероятность

Проверенный калькулятор с прозрачной формулой

Статистика и вероятность

Cumulative Frequency Calculator.

Calculates the cumulative frequency for a given class in a frequency distribution, along with the total frequency and relative cumulative frequency.

Результаты обновляются в реальном времени по мере ввода.
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Ваши данные

Как это работает

  1. 1

    Enter the frequency of the current class.

  2. 2

    Enter the cumulative frequency of all previous classes.

  3. 3

    Enter the total frequency of all classes.

  4. 4

    The calculator adds the current frequency to the previous cumulative to get the new cumulative frequency.

class_frequency + previous_cumulative

Часто задаваемые вопросы

What is cumulative frequency?

Cumulative frequency is the running total of frequencies up to a certain class in a frequency distribution.

How is relative cumulative frequency calculated?

It is the cumulative frequency divided by the total frequency, expressed as a percentage.

Can I use this for grouped data?

Yes, just enter the frequency of the class interval and the cumulative frequency from the previous interval.

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Результаты

Формула проверена

Cumulative Frequency

50

Relative Cumulative Frequency50,00%
Спросить что угодно

Оценка только для общего руководства — проверяйте важные решения с соответствующим специалистом.

Как это работает

Calculates the cumulative frequency for a given class in a frequency distribution, along with the total frequency and relative cumulative frequency.

  1. Enter the frequency of the current class.
  2. Enter the cumulative frequency of all previous classes.
  3. Enter the total frequency of all classes.
  4. The calculator adds the current frequency to the previous cumulative to get the new cumulative frequency.

Формулы

Математика, лежащая в основе этого калькулятора, изложена так, чтобы вы могли проверить результат.

Cumulative Frequency

CF = f + CF_prev

Add the frequency of the current class to the cumulative frequency of all previous classes.

Example:

Input: f = 15, CF_prev = 35

Calculation: 15 + 35

Result: 50

Relative Cumulative Frequency

RCF = (CF / Total) × 100%

Divide the cumulative frequency by the total frequency and multiply by 100 to get a percentage.

Example:

Input: CF = 50, Total = 100

Calculation: (50 / 100) × 100

Result: 50%

Примеры из реальной жизни

Где этот расчет встречается в повседневной жизни.

Analyzing test scores

Determine how many students scored below a certain threshold.

Example: Cumulative frequency up to a score of 70 shows number of students with 70 or less.

Quality control

Track cumulative defects to see if production is improving.

Example: Cumulative frequency of defects per day.

Income distribution

Find the number of households earning below a certain income level.

Example: Cumulative frequency of income brackets.

Советы и частые ошибки

Tips

  • Ensure the previous cumulative frequency is correct before adding.
  • Use the total frequency to verify that the final cumulative frequency equals the total.
  • Relative cumulative frequency helps compare distributions with different totals.
  • Round results appropriately for your context.

Common Mistakes to Avoid

  • Forgetting to add the current frequency to the previous cumulative.
  • Using the class frequency instead of the cumulative frequency in the relative calculation.
  • Not including all previous classes in the previous cumulative value.

Допущения и ограничения

  • Use the stated inputs and units.
  • Results are estimates for planning and education.
  • Check measurements and source data before making an important decision.