CUET Mathematics - The values of 'a' and 'b' if the equation of straight line trend by least square method is given by y = a + bx such that x = 0, y = 84, xy = 100, x^2 = 70 for 6 observation at are: | PYQs + Solutions

CUET Mathematics 2025 22 May Shift 2

Statistics & Applications

Medium

applied

$a = 0,b = 1.28$

$a = 14,b = 1.54$

$a = 11.6,b = 0$

$a = 14,b = 1.28$

✅ Correct Option: 2

Related questions:

16 May Shift 1

Irregular trends in a time series are caused by

(A) Epidemics

(B) Strikes

(D) Floods

Choose the correct answer from the options given below:

15 May Shift 2

Year (x)	2011	2012	2013	2014	2015	2016	2017
Sales (in lakh Rs.) (y)	65	68	70	72	75	67	73

If $y = 70 + 0.94(x - 2014)$ be a straight line trend fitted by the method of the least squares to the above data, then the trend value for the year 2015 is:

14 May Shift 2

For the given 5 values 24, 18, 33, 42, 24; the 3-year moving averages are:

CUET Mathematics 2025 22 May Shift 2 PYQs

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