問題一覧
1
Which of the following is not a characteristic of good average
It should be influence by fluctuations in sampling
2
Which mean is mainly used to find rates
Harmonic
3
In which of the following means weights are assigned automtically
Harmonic
4
Harmonic means is always________ than GM
Less
5
The following formula belongs to
GM
6
Which of the following is not affected by extreme values
GM
7
Least square property of arithematic mean states that
The sum of square of deviation from its arithematic mean is MINIMUM
8
Standard error of which of the following is lesser
AM
9
The formula belongs to
Combined AM
10
Which of the following is correct
Mode= 3 Median - 2 Mean
11
x =∑fm/∑f belongs to
AM, CONTINUOUS SERIES
12
X = N/ (∑1/x)
HM
13
Range of dispersion is given by
L-S
14
Coefficient of Range of dispersion is given by
(L-S / L+S)×100
15
Which of the following methods cannot be used for open end classification
Range
16
which of the following is called upper quartile
Q3
17
Which of the following is the method of quartile deviation
Q3-Q1/2
18
Which of the following is the method of coefficient of quartile deviation
(Q3-Q1/Q3+Q1)×100
19
Q2 quartile represents
Median
20
How to find Q1
(n+1)/4
21
How to find Q3
3× (n+1)/4
22
value of correlation coefficienties between
-1 to 1
23
Which of the following gives us Cause and effect relation between X and Y
Regression
24
In correlation analysis
rxy= ryx
25
In regression analysis
bxy≠byx
26
Correlation Analysis
is independent of change in scale and origin
27
Regression Analysis
is independent of change in origin and not scale
28
Which of the following is correct
r= √(bxy × byx)
29
The sign of bxy, byx and rxy is
Same
30
which of the following is least affected by extreme values
Median
31
which of the following coincides with the median completely in a symmetrical distribution
Mean
32
If both events are independent the probability that both events will occur is
P(A) × P(B)
33
A sampling method in which the entire population is divided into homogeneous sub groups is called
Startified
34
A sampling method in which the sample is chosen as per accessibility
Convenience
35
What is P value in hypothesis testing
probability of obtating results to check that null hypothesis is true
36
What is the critical region in hypothesis testing
The region where null hypothesis is rejected
37
The process of using a single value to estimate population parameter
Point estimation
38
What is utility of confidence interval
To provide a range of values within which population parameter lies
39
Sample mean is a _______ estimate of population mean
point
40
Z× (σ/√n) is the method of finding
margin of error
41
Margin error in population estimation refers to
The range of values within which the true population parameter is likely to fall
42
When the confidence interval is wide
Estimation will be less precise
43
In time series analysis, what does the ADF test examine?
Unit root presence
44
Which of the following test is used to test auto correlation
Durbin Watson test
45
Which of the following test is used for goodness of fit
r square test
46
Which econometric model is suitable for binary dependent variables?
Probit
47
Which of the following test is used for functional form misspecification
Ramsey retest test
48
Which of the following test is used for joint significance of coefficients
Waldt
49
What does contigeration in econometrics states
Long-run equilibrium relationship between variables
50
The AIC (Akaike Information Criterion) is commonly used for:
Model selection
51
The Ramsey RESET test involves assessing the significance of additional powers of
Dependent variable
52
White test is primarily used to test for:
Heteroscedasticity
53
Heteroscedasticity means
Large variance in residuals
54
In symmetrically distributed series
Mean= Median = Mode
55
In a positively skewed distribution which of the following holds true.
Right tailed distribution, Mean>Median>Mode
56
In a negatively skewed distribution which of the following holds true.
left tailed distribution, Mean<Median<Mode
57
In karl pearson's measure of skewness which of the following measure is independent of individual units
Relative
58
In absolute measurement technique of skewness under karl Pearson the formula is
Mean- Mode
59
In absolute measurement technique of skewness under karl Pearson(ill defined mode) the formula is
3(Mean- Median)
60
In relative measurement technique of coefficient of skewness under karl Pearson the formula is
(Mean- Mode)/SD
61
In relative measurement technique of skewness under karl Pearson(ill defined mode) the formula is
3(Mean-median)/SD
62
The value of Karl pearson's skewness(Skp) lies between
1 to -1
63
In case of no skewness the value of Karl pearson's skewness(Skp) is
0
64
If there is positive skewness value of Karl pearson's skewness(Skp) lies between
0 to 1
65
If there is negative skewness value of Karl pearson's skewness(Skp) lies between
0 to -1
66
The formula of Bowley's absolute (Skb) skewness measurement is
Q3 + Q1- 2Median
67
The formula of Bowley's Relative coefficient of (Skb) skewness measurement is
(Q3 + Q1- 2Median)/Q3-Q1
68
In case of positive skewness the gap between median and ______ is higher
Q3
69
In case of negative skewness the gap between median and ______ is higher
Q1
70
In case of Zero skewness the gap between median and ______ is higher
None
71
"μ" in statistics is called
Population mean
72
The μ2 moment is the
Variance
73
The formula of β1 in skewness measurement is
(μ3)²/(μ2)³
74
If μ3 is +ve then
β1 will be +ve and positively skewed
75
If μ3 is -ve then
β1 will be -ve and negatively skewed
76
The formula of γ in skewness measurement is
√β1
77
If regression line passes through the origin the value of _______ will be zero
Intercept
78
Identify the "A" labelled curve in the given picture
mesokurtic
79
Identify the "B" labelled curve in the given picture
Leptokurtic
80
Identify the "C" labelled curve in the given picture
Platykurtic
81
which moment is used to measure kurtosis
μ4
82
What is formula of β2 is measure of kurtosis
μ4/(μ2)²
83
What is the formula of coefficient of kurtosis γ
γ =β2-3
84
If the value of β2=3
The distribution will be mesokurtic
85
If the value of β2>3
The distribution will be Leptokurtic
86
If the value of β2<3
The distribution will be platykurtic
87
Which statistic can help identify outliers in a dataset?
Skewness
88
The type of sampling technique in which a fixed nth term is selected from the population
Systematic random sampling
89
If both events are mutually exclusive the probability that both events will occur is
P(A) + P(B)
90
If both events are not mutually exclusive the probability that both events will occur is
P(A) + P(B)- P(A) n P(B)