A. stating H1
B. stating Ho
C. L of significance
D. Test statistics
Statistics Mcqs
Criteria to check a point estimator to be good are………….?
A. Consistency
B. All Above
C. Unbiasedness
D. Efficiency
Consistency of an estimator can be checked by comparing…………?
A. Standard Deviation
B. Mean
C. mean Square Error
D. Variance
Herbicide A has been used for years in order to kill a particular type of weed. An experiment is to be conducted in order to see whether a new herbicide, Herbicide B, is more effective than Herbicide A. Herbicide A will continue to be used unless there is sufficient evidence that Herbicide B is more effective. The alternative hypothesis in this problem is………….?
A. Herbicide A is more effective than Herbicide B
B. Herbicide A is not more effective than Herbicide B
C. Herbicide B is more effective than Herbicide A
D. Herbicide B is not more effective than Herbicide A
Which of the following is an assumption underlying the use of the t-distribution ?
A. The sample are drawn from a normally distributed population.
B. The variance of the population is known
C. All above
D. s (sample standard deviation) is an unbiased estimate of the population variance.
The t distribution are………….?
A. Symmetrical
B. None of these
C. Same as Normal Curve
D. Skewed
Which of the following is a true statement for comparing the t distribution with standard normal ?
A. Greater the degree of freedom, the more the t-distribution resembles the standard normal distribution
B. The Normal Curve is symmetrical whereas the t-distribution are slightly skewed.
C. The proportion of area beyond a specific value of “t” is less than the proportion of normal curve
D. Non of these
The Mann-Whitney U test is preferred to a t-test when…………?
A. Sample are dependent
B. The assumption of normality is not met
C. Sample sizes are small
D. Data are paired
The sign test assumes that the……………?
A. Samples are independent
B. Samples have same mean
C. Sample are dependent
D. The Wilcoxon Signed Rank test is used
Three brands of coffee are rated for tasted on a scale of 1 to 10. Six persons are asked to rate each brand so that there is a total of 18 observations.The appropriate test to tasted equally good is………….?
A. One way analysis of variance (ANOVA)
B. Spearman Rank difference
C. Wilcoxon Rank-Sum test
D. Kruskal-Wallis test