Statistics

Sampling Techniques
Bias and relative bias are two different estimates:
True
False
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Probability Distribution
Mean of Gamma distribution is:
(a-1)ß
aß
(a-1)ß2
aß2
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Corelation and Regression
Regression analysis was applied between $ sales (y) and $ advertising (x) across all the branches of a major international corporation. The following regression function was obtained) ! = 5000 + 7.25x If the advertising budgets of two branches of the corporation differ by $30,000, then what will be the predicted difference in their sales? :
$217,500
222,500
5000
7.25
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Introduction to Statistics
To enhance a procedure the control charts and procedures of descriptive statistics are classified into:
Behavioural Tools
Serial Tools
Industry Statistics
Statistical Tools
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Statistical Inference
Testing of hypothesis is the branch of:
Statistical Method
Statistical Inference
Both A andB
None of these
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Measures of Dispersion
The range of the values -5, -8, -10, 0, 6, 10 is:
0
10
10
20
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Introduction to Statistics
The scale applied in statistics which imparts a difference of magnitude and proportions is considered as:
Exponential Scale
Goodness Scale
Ratio Scale
Satisfactory Scale
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Sampling Techniques
The cluster may be:
equal
unequal
equal or unequal
constant
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Corelation and Regression
The data are the same as for question 4 above. The relationship between number of beers consumed (x) and blood alcohol content (y) was studied in 16 male college students by using least squares regression. The following regression equation was obtained from this study: != -0.0127 + 0.0180x Suppose that the legal limit to drive is a blood alcohol content of 0.08. If Ricky consumed 5 beers the model would predict that he would be:
0.09 above the legal limit
0.0027 below the legal limit
0.0027 above the legal limit
0.0733 above the legal limit
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Introduction to Statistics
Which one is the not measure of dispersion.:
The Range
50th Percentile
Inter-Quartile Range
Variance
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