📈Statistics MCQs
Statistics MCQs
490 MCQs71
if f(x1,x2,…xn;θ)=g(θˆ;θ)h(x1,x2,….,xn), then θˆ is____________?
AConsistent
BSufficient
CEfficient
DUnbiased
72
Which of the following test use Rank Sums____________?
AKruskal-Wallis and Wilcoxon tests
BRuns test
CChi-Square and sign test
DF test
73
Wilcoxon Rank-Sum test can be of_______________?
ALower tailed
BUpper tailed
CEither of the above
DNone of the above
74
When using the sign test, if two scores are tied, then_____________?
AWe count them
BWe discard them
CWe depends upon the scores
Dnon of these
75
In a Wilcoxon Rank-Sum test__________________?
ATies within one sample may affect the decision
BTies always affect the decision
CTies never affect the decision
DTies between the two sample may affect the decision
76
The Spearman Rank-Correlation test requires that the______________?
AData must be measured on the same scale
BData should be of ordinal scale at least
CData must be distribution at least approximately as a t-distribution
DData must be from two independent samples
77
To perform a Runs test for randomness the data must be_______________?
ADivided into at least two classifications
BDivided into exactly two classifications
CQuantitative
DQualitative
78
The critical value of a test statistic is determined from_____________?
AThe sampling distribution of the statistics assuming Null Hypothesis
Bcalculations based on many actual repetitions of the same Experiment
CThe sampling distribution of the statistic assuming Alternative Hypothesis.
DNon of these
79
what is the probability of a type II error when α=0.05 ?
A0.025
B0.95
C0.05
DCannot be determined without more information
80
condition for applying Central Limit Theorem (CLT) which approximate the sampling distribution of the mean with a normal distribution is ?
An > 30
BN(1 – p) > 5
C2 n 5 E. N < 30