AP EAMCET · Maths · Statistics
If the variance of the distribution
\begin{array}{cccccccc}
\hline \boldsymbol{x}_{\boldsymbol{i}} & 4 & 8 & 11 & 17 & 20 & 24 & 32 \\
\hline \boldsymbol{f}_{\boldsymbol{i}} & 3 & 5 & 9 & 5 & 4 & 3 & 1
\end{array}
is 45.8 , then the variance of the distribution.
\begin{array}{llllllll}
\hline \boldsymbol{x}_{\boldsymbol{i}} & 10 & 18 & 24 & 36 & 42 & 50 & 66 \\
\hline \boldsymbol{f}_{\boldsymbol{i}} & 3 & 5 & 9 & 5 & 4 & 3 & 1 \\
\hline
\end{array}
- A 93.6
- B \(\sqrt{93.9}\)
- C 183.2
- D \(\sqrt{183.2}\)
Answer & Solution
Correct Answer
(C) 183.2
Step-by-step Solution
Detailed explanation
Mean of given observation \(\left(x_i\right)\) is \[ \begin{array}{r} \frac{(4 \times 3)+(8 \times 5)+(11 \times 9)+(17 \times 5)+(20 \times 4)}{+(24 \times 3)+(32 \times 1)} \\ =\frac{420}{30}=14 \end{array} \] So,…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Maths
- A line is passing through the point \((4,3)\) and the sum of its intercepts made on the coordinate axes is 14 . Then an equation of that line isAP EAMCET 2018 Medium
- If the focus of a parabola divides a focal chord of the parabola into segments of lengths 5,3 units, then the length of the latusrectum of that parabola isAP EAMCET 2019 Medium
- If \(x_1, x_2, x_3\) as well as \(y_1, y_2, y_3\) are in geometric progression with the same common ratio, then the points \(\left(x_1, y_1\right)\), \(\left(x_2, y_2\right),\left(x_3, y_3\right)\) areAP EAMCET 2016 Easy
- If \(I_n=\int_0^{\pi / 2} \sin ^n(x) d x\) and \(I_n=(k) I_{n-2}\), then what will be the value of \(k\) ?AP EAMCET 2020 Hard
- If \(A\) and \(B\) are square matrices of order 3 , then \(\left|\left(A-A^T\right)+\left(B-B^T\right)\right|=\)AP EAMCET 2017 Medium
- If a point moves along the ellipse and if is the centre of the ellipse, then the sum of maximum and minimum values of isAP EAMCET 2021 Medium
More PYQs from AP EAMCET
- Let \(f(x)=\int \frac{x}{\left(x^2+1\right)\left(x^2+3\right)} d x\). If \(f(3)=\frac{1}{4} \log \left(\frac{5}{6}\right)\) then \(f(0)=\)AP EAMCET 2024 Medium
- The half-life of a radioactive sample is 20 days this means thatAP EAMCET 2020 Easy
- The sum of the fourth powers of the roots of the equation \(x^3+x+1=0\) isAP EAMCET 2008 Medium
- A short bar magnet of magnetic moment \(10^4 \mathrm{~J} \mathrm{~T}^{-1}\) is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from the direction parallel to a horizontal magnetic field of \(4 \times 10^{-5} \mathrm{~T}\) to a direction \(60^{\circ}\) to the direction of the field isAP EAMCET 2025 Medium
- The correct order for increasing reactivity towards \(S_N 1\) substitution for the following compounds is
\(\begin{array}{ll}\text { 1. } \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Br} & \text { 2. } \mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3 \\ \text { 3. } \mathrm{CH}_2=\mathrm{CHBr} & \text { 4. } \mathrm{CH}_3-\mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3\end{array}\)AP EAMCET 2021 Easy - Which of the following are general methods for the preparation of 1-iodopropane?
AP EAMCET 2024 Medium