Statistics Multiple Choice Questions (MCQ)

51- The method 6f least squares finds. the best fit line that the error between observed and estimated points on the line are
(A) maximize
(B) minimize
(C) minimize or maximize
(D) approaches to infinity
52- A population is perfectly homogenous in respect of a characteristic. What size of sample would you prefer?
(A) a large sample
(B) a small sample
(C) whole item
(D) single item
53- In-which of the methods the entire population is divided into a number of homogeneous groups
(A) two stage sampling
(B) cluster sampling
(C) simple random sampling
(D) stratified random sampling
54- If generated value of tolerance is equals to 1 it is an indication of
(A) high multicollinearity
(B) no multicollinearity
(C) perfect multicollinearity
(D) low multicollinearity
55- ___ used a regression of leaf area on leaf weight to estimate the average area of the leaves on a plant.
(A) Watson
(B) Keyfitz’
(C) Olkin
(D) Yates
56- What can you say about the efficiency of the multistage sampling, compared to single stage sampling?
(A) no efficient
(B) more efficient
(C) equal efficient
(D) less efficient
57- If R² is zero, that is no multicollinearity, the variance inflation factor (VIF) will be
(A) three
(B) two
(C) one
(D) zero
58- Which one problem out of the four is not related to stratified sampling?
(A) fixing the points of demarcation between strata
(B) fixing the sample size
(C) fixing the number of strata
(D) fixing the criterion for stratification
59- The method of confounding is a device to reduce the size of
(A) blocks
(B) experiments
(C) treatments
(D) replications
60- For two variables X and Y the equations of the regression lines are 9y – x – 288 = 0 and x – 4y + 38= 0 . The correlation coefficient between X and Y is
(A) 1/36
(B) 3/2
(C) 1/9
(D) 2/3
51-(B), 52-(D), 53-(D), 54-(C), 55-(A), 56-(D), 57-(C), 58-(B), 59-(A), 60-(D)