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Online Tests
Statistics Ics Part 2 Chapter 3 Online Test MCQs With Answers
Question # 1
The difference of upper and lower limits of confidence interval measures the
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level of significance
level of confidence
interval
precision
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Question # 2
By increasing the sample size, the precision of confidence interval is:
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Decreased
Increased
Constant
Unchanged
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Question # 3
Large sample contains more than
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5 values
10 values
20 values
30 values
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Question # 4
The probability associated with confidence interval is called:
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Level of confidence
Confidence coefficient
Both A and B
Confidence limits
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Question # 5
A single value used to estimate a population value is called:
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Interval estimate
Point estimate
Confidence interval
Level of confidence
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Question # 6
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best estimators
biased estimators
unbiased estimators
normal estimators
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Question # 7
If 1-α = 0.90, the value of Z
a/2
is:
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1.645
1.96
2.326
2.575
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Question # 8
If (1-α) is increased, the with of a confidence interval is:
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Decreased
Increased
Constant
Same
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Question # 9
The process of making estimates about the population parameter from a sample is called:
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Statistical independence
Statistical inference
Statistical hypothesis
Statistical decision
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Question # 10
Statistic is an estimator and its calculated value is called:
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Biased estimate
Estimation
Interval estimate
Estimate
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Question # 11
If mean of the sampling distribution is equal to the parameter then the estimator will be
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biased
consistent
sufficient
unbiased
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Question # 12
Types of statistical inferences are
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one
two
three
four
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Question # 13
A specific value of an estimator computed from the sample data is called
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estimation
estimate
interval estimate
point estimate
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Question # 14
The following statistic are unbiased estimators:
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The Sample mean
S
2
= Σ(X - X)
2
/n-1
The sample proportion
All the above
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Question # 15
Confidence intervals which are often used in practice are
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90%
95%
98%
all of these
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Question # 16
A range of values within which the population parameter is expected:
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Confidence interval
Confidence coefficient
Confidence limits
Level of significance
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