Zadanie 1a
Find a and b for the least-squares line of T on L, T=aL+b.
Correlation and predicting y from x
Interpret linear association and Pearson correlation, obtain a regression of y on x and assess prediction limits.
Tę umiejętność sprawdza 20 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 20 Otwórz w wyszukiwarce z filtrami
Zadanie 1b
State Pearson’s correlation coefficient.
Zadanie 1c
Predict the cooling time at 1150 revolutions per minute using the regression of T on L.
Zadanie 1a
Find a and b.
Zadanie 1b
Use this model to estimate the energy use of a 12-hour cycle.
Zadanie 4b
Find the mean height and the mean crown width.
Zadanie 3b
Find (i) the mean of y; (ii) p.
Zadanie 3c
Hence find Pearson’s correlation coefficient.
Zadanie 2a
Verify that the mean y is 14.
Zadanie 2b
Find p and q.
Zadanie 5a
Find Pearson’s correlation coefficient.
Zadanie 5b
The technician substitutes x=10 into the given regression line to predict y. Give one reason this is inappropriate.
Zadanie 10a
(i) Find a,b for the least-squares regression of p on t. (ii) Interpret a in context.
Zadanie 10b
The linear model predicts 23.94 MW for 2034, when t=24. Comment on the reliability of this prediction.
Zadanie 1a
Find a, b for the least-squares regression E = at + b.
Zadanie 1b
Use the regression to predict stored energy at t = 18.
Zadanie 2b
(i) Predict c when a=44. (ii) Find the mean of the a readings.
- Materiał graficzny
Zadanie 1a
Find a and b.
Zadanie 1b
State the Pearson correlation coefficient.
Zadanie 1c
Predict the output at input 25, to the nearest integer.