CUET Mathematics - For a straight line trend y_t = a+bx for n data by the method of least squares if, n=8, y=47.8, xy=4.3 and x^2=42, then y_t at x=-3.5 is _____. [where y_t represents trend value of y] | PYQs + Solutions

CUET Mathematics 2026 30th May Shift 2

Statistics & Applications

Medium

applied

3.983

6.332

-3.4458

5.62

✅ Correct Option: 4

Related questions:

16 May Shift 1

In an influenza epidemic, the number of cases diagnosed in a week were as follows:

Day	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Number of Cases	10	12	8	16	9	14	4

The 3-day moving averages are:

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 $y = 70 + 0.964(x - 2014)$ 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:

21 May Shift 2

For the given five values, 13, 17, 21, 22, 32; the 3-year moving averages are:

CUET Mathematics 2026 30th May Shift 2 PYQs

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