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a 1 in x systematic random sample is obtained by randomly selecting one of the first "x" units in the sampling frame and then selecting every subsequent xth unit Its generally used in a continuous process. First observation is chosen randomly and then other observations are picked by adding some constant "c" to the successive observations. c = N/n where N = size of population and n = size of sample It's important to check that the data is not having a periodic property. (Foe eg. If sales are analysed and x is taken as 7, then sample will include the sales on the same day of every week)
The average age of A, B and C is 25 years, while the average age of B, A and D is 23 years. If the ratio of the age of C and D is 5:3, respectively, the...
The ratio of present ages of Rohan to his father is 2:7, and the ratio of present ages of Rohan to his mother is 3:10. If Rohan's...
Currently, the average age of individuals 'A' and 'B' is 17 years, with 'A' being 2 years older than 'B'. The age of 'C' is 50% greater than that of 'A'...
Sum of the present ages of A, B, C and D is 54 years. After 4 years ratio of their ages is 5:4:3:2. What is C’s present age?
In a family a couple has a son and a daughter. The age of the father is four times that of his son and age of her daughter is half of her mother. The wi...
Sum of the present ages of A, B, C and D is 60 years. After 6 years ratio of their ages is 6:5:5:4. What is C’s present age?
The ratio of A and B present age is 3:2. The product of their ages is 2400. What will be the ratio of their ages after 5 years?
The ratio of the present ages of P and Q is 6:5 respectively. If the age of P 12 years hence from now will be 125% more than the age of Q 4 years ago fr...
The ratio of the present ages of Ginni and Binni is 8:3 respectively. Ginni is ‘n’ years older than Binni. If after 4 years, the ratio of the ages o...
Five years ago, the ratio of the age of Tarun to that of Ayush was 6 : 11. Umesh is 10 years older than Tarun. Umesh is ten years younger than Ayush. Wh...
