Zadanie 1a
State the mode.
Location, spread and transformed data
Calculate or estimate measures of centre and spread and determine how shifting or scaling observations affects them.
Tę umiejętność sprawdza 37 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 37 Otwórz w wyszukiwarce z filtrami
Zadanie 1b
Find (i) the mean; (ii) the median; (iii) the population standard deviation.
Zadanie 1c
The interquartile range is 14 minutes. Find a.
- Materiał graficzny
Zadanie 2b
The class frequencies are 5 for 20 ≤ h < 25, 11 for 25 ≤ h < 30, 16 for 30 ≤ h < 35, p for 35 ≤ h < 40 and q for 40 ≤ h < 45. (i) Find p and q. (ii) Estimate the mean from this table, to four significant figures.
- Materiał graficzny
Zadanie 1a
Find the interquartile range.
- Materiał graficzny
Zadanie 6a
(i) Show that . (ii) Hence find the mean of the eight areas in the form , where p is a positive rational number and a is a positive integer.
Zadanie 6b
Find the median area in the form cm2, with q a positive rational number.
Zadanie 1a
Find (i) the mean power and mean rise; (ii) the equation of Model A.
Zadanie 3a
Find the mean of x.
Zadanie 4a
Explain why the median of all 26 masses remains 18 g.
Zadanie 4b
Find L and H.
Zadanie 1a
State the median and interquartile range for machine B.
- Materiał graficzny
Zadanie 1b
Compare the two sample distributions using (i) their medians; (ii) their interquartile ranges. Justify both comparisons.
- Materiał graficzny
Zadanie 1a
Find (i) the median; (ii) the interquartile range.
Zadanie 1b
Show that the 11.1-minute job is an outlier.
Zadanie 2a
Find p and q.
Zadanie 2b
State the mean displayed score.
Zadanie 3b
Find p and q.
Zadanie 1a
State (i) the mode; (ii) the range; (iii) the median.
Zadanie 1b
Find the interquartile range.
Zadanie 1a
State (i) the mode; (ii) the range; (iii) the median.
Zadanie 1b
Find the interquartile range.
Zadanie 7e
Using the class midpoints, estimate (i) the mean device age; (ii) its variance.
Zadanie 7f
The panels schematically compare centres and spreads; no normal model is assumed. (i) Which panel best represents R and S? (ii) Which network does its dotted line represent?
- Materiał graficzny
Zadanie 7e
Using the class midpoints, estimate (i) the mean device age; (ii) its variance.
Zadanie 7f
The panels schematically compare centres and spreads; no normal model is assumed. (i) Which panel best represents R and S? (ii) Which network does its solid line represent?
- Materiał graficzny
Zadanie 7b
Use the cumulative graph to estimate (i) the median daily count; (ii) the number of days when at least 80% of capacity was used.
- Materiał graficzny
Zadanie 7d
The box plot summarizes processing times for the 20000 specimens. (i) Estimate how many took between 4 and 28 minutes. (ii) Half took less than a minutes; estimate a.
- Materiał graficzny
Zadanie 7e
For the next 50-day cycle, capacity is expanded to 612. The model adds 12 specimens to each daily count. (i) Find the new mean daily count. (ii) State the effect on the variance.
Zadanie 7b
Use the cumulative graph to estimate (i) the median daily count; (ii) the number of days when at least 80% of capacity was used.
- Materiał graficzny
Zadanie 7d
The box plot summarizes processing times for the 20000 specimens. (i) Estimate how many took between 4 and 28 minutes. (ii) Half took less than a minutes; estimate a.
- Materiał graficzny
Zadanie 7e
For the next 50-day cycle, capacity is expanded to 612. The model adds 12 specimens to each daily count. (i) Find the new mean daily count. (ii) State the effect on the variance.
Zadanie 2a
Find x.
Zadanie 2b
Find the population standard deviation.
Zadanie 3a
Using the 1.5×IQR rule, find the largest c reading that would not be classified as an upper outlier.
- Materiał graficzny
Zadanie 5a
State the median warm-cache latency.
- Materiał graficzny
Zadanie 5c
Explain why the warm-cache mean appears likely to exceed its median.
- Materiał graficzny