Statistics

The central angles $p, q, r$ and $s$ (in degrees) of four sectors in a Pie Chart satisfy the relation $9 p=3 q=2 r=6 s$. What is the value of $4 p-q$ ?

Consider the following grouped frequency distribution : $\begin{array}{|l|l|l|l|l|l|l|} \hline \text { Class } & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 & 50-60 \\ \hline \text { Frequency } & 1 & 2 & 4 & 6 & 4 & 3 \\…

In a study of two groups, the following results were obtained: Which of the following statements is correct?

What is the median of the numbers $4.6,0,9.3,-4.8,7.6,2.3, 12.7,3.5, 8.2,6.1,3.9, 5.2?$

Consider the following data: What is the regression equation of $y$ on $x$ ?

What is the percentage of rural male population (over the whole population) in the year 1998 ?

The following pie chart gives the distribution of funds in a five year plan under the major heads of development expenditures: Agriculture (A), Industry (B), Education (C), Employment (D) and Miscellaneous (E). The…

The frequency distribution of life of 90 TV tubes whose median life is 17 months is as follows: What is the missing frequency y ?

The following pie chart gives the distribution of funds in a five year plan under the major heads of development expenditures: Agriculture (A), Industry (B), Education (C), Employment (D) and Miscellaneous (E). The…

What is the total population for the year 1997?

The following pie chart gives the distribution of funds in a five year plan under the major heads of development expenditures: Agriculture (A), Industry (B), Education (C), Employment (D) and Miscellaneous (E). The…

Mean of 100 observations is 50 and standard deviation is 10. If 5 is added to each observation, then what will be the new mean and new standard deviation respectively?