Q.1
A population has N items. Samples of size n are selected without replacement. Find the number of possible samples.
  • a) NCn
  • b) nCN
  • c) 2n
  • d) 2N
Q.2
Find the number of all possible samples from a population containing 8 items from which 2 items are selected at random without replacement.
  • a) 56
  • b) 28
  • c) 66
  • d) 38
Q.3
A bag contains 6 balls of different colours. A student selects 2 balls at random without replacement. Find all possible combinations of the colours of the selected balls.
  • a) 13
  • b) 14
  • c) 15
  • d) 16
Q.4
Consider a population containing N items and n are selected as a sample with replacement. Find all the possible samples.
  • a) N
  • b) nN
  • c) NCn
  • d) Nn
Q.5
A bag contains 6 pairs of socks. If 2 pairs of socks are selected at random with replacement then the number of possible samples is?
  • a) 6
  • b) 12
  • c) 36
  • d) 216
Q.6
Find the sampling fraction where N is population size and n is the sample size?
  • a) n/N
  • b) NCn
  • c) nN
  • d) Nn
Q.7
In random sampling the probability of selecting an item from a population is unknown.
  • a) True
  • b) False
Q.8
In a sampling distribution the population correction factor is given by?
  • a) (N-1/N-n)1/2
  • b) (N-n/N-1)1/2
  • c) (n-1/N-n)1/2
  • d) (N-1/n-1)1/2
Q.9
A population hasitems and a sample has been selected from it containing 5 items. Find the finite population correction factor.
  • a) (5/8)1/2
  • b) (5/7)1/2
  • c) (5/9)1/2
  • d) (5/6)1/2
Q.10
Find the value of standard error Ẋ in a sampling distribution with replacement. Given that standard deviation of the population ofitems is 8.
  • a) 3
  • b) 4
  • c) 2
  • d) 5
0 h : 0 m : 1 s