Provided , the expression is identical to
Tap an option to check your answer.
2 marks, −1StatisticsDescriptive statistics and dispersionThe arithmetic mean and its propertiesModerateabout 2 min
DSE 2005 Question 21: Descriptive statistics and dispersion
Answer and worked solution
Checking your account…
Plain-text version
Provided c≠ 0, the expression (Σᵢ₌₁ⁿ(c-xᵢ)-Σᵢ₌₁ⁿ(cyᵢ-xᵢ))/c is identical to (A) 1-nȳ (B) n-nȳ (C) n+nȳ (D) 1+nȳ
Also written as: Provided c!= 0, the expression (sum_(i=1)^n(c-x_i)- sum_(i=1)^n(cy_i-x_i))/c is identical to
Descriptive statistics and dispersion has come up 117 times in 6 exams since 2004.
What this question tests
This question is on The arithmetic mean and its properties, part of Descriptive statistics and dispersion in Statistics.
Computing the mean from raw and grouped data, and what changes when data are shifted, scaled or corrected.
TestStop has 12 past-paper questions on this subtopic; the nearest in year are below.
Similar questions from other papers
- The coefficient of variation is a relative measure of variability. It measures the _ to the _.
- If kurtosis is defined as (m₄/σ⁴-3), where m₄ is the 4^(th) order central moment and σ is the standard deviation, then its value is positive for
- If Mode is 11, Mean 8, the difference of the two Quartiles is 8 and the sum of the two Quartiles is 22, then the Coefficient of Skewness will be: A. +0.5 B. -0.5 C.…
- What is the geometric mean of 2, 4 and 8?
- For a positively skewed frequency distribution,.
Question from the DSE 2005 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.