Mathematics · 2024
JEE Main · 1 February 2024, Shift 1 · Q18
Let the median and the mean deviation about the median of 7 observation 170, 125, 230, 190, 210, a, b be 170 and 205/7 respectively. Then the mean…
Let the median and the mean deviation about the median of $\displaystyle 7$ observation $\displaystyle 170$, $\displaystyle 125$, $\displaystyle 230$, $\displaystyle 190$, $\displaystyle 210$, a, b be $\displaystyle 170$ and $\displaystyle \frac{205}{7}$ respectively. Then the mean deviation about the mean of these $\displaystyle 7$ observations is:
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle 30$
More from Statistics
- Suppose that the mean and median of the non-negative numbers 21,8,17, a, 51,103, b, 13,67,(a>b), are 40 and 21, respectively. If the mean deviation…2026
- For 10 observations x_1, x_2, …, x_10, if Σ_i=1^10(x_i+2)^2=180 and Σ_i=1^10(x_i-1)^2=90, then their standard deviation is:2026
- Let the mean and variance of 8 numbers -10,-7,-1, x, y, 9,2,16 be 7/2 and 293/4, respectively. Then the mean of 4 numbers x, y, x+y+1,|x-y| is:2026
- Let the mean and the variance of seven observations 2,4, α, 8, β, 12,14, α<β, be 8 and 16 respectively. Then the quadratic equation whose roots are 3…2026
- If the mean deviation about the median of the numbers k, 2 k, 3 k, ….., 1000 k is 500, then k^2 is equal to:2026
- If the mean and variance of five observations are 24/5 and 194/25 respectively and the mean of the first four observations is 7/2, then the variance…2024
- The variance σ^2 of the data is ____.2024
- For a statistical data x_1, x_2, …, x_10 of 10 values, a student obtained the mean as 5.5 and Σ_i=1^10 x_i^2=371. He later found that he had noted…2025
JEE Main 2024 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.