Skip to main content

STA301 Quiz No.2 Shared by Uzma Komal

Question # 1 of 10 ( Start time: 07:56:50 PM ) Total Marks: 1
Among 18 articles, six having minor Defects and three have major defects. Determine the probability that an article selected at random has major defect.
Select correct option:
1/6
1/5
0.25
0.11


Question # 2 of 10 ( Start time: 07:57:47 PM ) Total Marks: 1
The deviation of a distribution from symmetry is called:
Select correct option:
Kurtosis                                ok
Skewness
Dispersion
Flatness


Question # 3 of 10 ( Start time: 07:58:14 PM ) Total Marks: 1
The variance of a sample of 81 observations is equal to 64; The standard deviation of these observations will be:
Select correct option:
256
4096
8
6561


Question # 4 of 10 ( Start time: 07:59:10 PM ) Total Marks: 1
Bowley’s coefficient of skewness for a certain data is ZERO. What is the shape of the distribution of data?
Select correct option:
Symmetrical                       ok
Asymmetrical
Uniform
Bi-modal


Question # 5 of 10 ( Start time: 07:59:57 PM ) Total Marks: 1
Moment ratio b1 is used to measure:
Select correct option:
Mean
Peakedness
Skewness            ok
Kurtosis


Question # 6 of 10 ( Start time: 08:00:46 PM ) Total Marks: 1
Which of the following is not a measure of central tendency?
Select correct option:
Percentile
Quartile
Standard deviation
Mode                    ok


Question # 7 of 10 ( Start time: 08:01:13 PM ) Total Marks: 1
When our data set contains a few very high or a few very low values we use ....... as a representaitve average.
Select correct option:
Mode
Mean
Median                                ok
All above

Question # 8 of 10 ( Start time: 08:02:01 PM ) Total Marks: 1
According to Chebychev’s rule, at least 8/9 of the data values will fall within:
Select correct option:
(Mean-S.D, Mean+S.D)
(Mean-2S.D, Mean+2S.D)
(Mean-3S.D, Mean+3S.D)                            ok
None of these


Question # 9 of 10 ( Start time: 08:02:57 PM ) Total Marks: 1
If P(A or B) = P(A)+P(B), then A and B are:
Select correct option:
Mutually exclusive events           ok
Independent events
Exhaustive events
Equally likely events


Question # 10 of 10 ( Start time: 08:03:48 PM ) Total Marks: 1
If a distribution has negative skewness, in what order (lowest to highest) will the averages be?
Select correct option:
mean, mode, median                    ok
mean, median, mode
mode, median, mean
median, mode, mean

Comments

Post a Comment

Please give us your feedback & help us to improve this site.

Popular posts from this blog

CS614 Quiz No.4 Shared by Princess (solved), Spring 2014

  “What means What”. The phrase refers to: Select correct option:  Meta data  External data Transformed data Internal representations Question # 2 of 10 Which of the following is NOT one of the activities of “Maintenance and Growth” phase in Kimball’s DWH development approach? Select correct option: Education Technical Education Program Support  Interface Deployment                 Question # 3 of 10 Horizontally wide data means: Select correct option: Dataset has large no. of attributes Dataset has large no. of records Dataset has attribute skews Dataset has partitioning skews                 Question # 4 of 10 Which of the following is NOT one of the top-10 mistakes that should be avoided during DWH development? Select correct option: Not interacting directly with end ...
1 comment
Read more

CS614 Quiz No.4 Shared by MT Khan (Solved)

Question # 1 of 10 ( Start time: 09:04:39 PM ) Total Marks: 1 A typical cycle of implementing the change in DWH comprises of the sequence: Select correct option: Production -> QA -> Development Development-> QA -> Production(CORRECT) Development -> Production -> QA Production -> Development -> QA Question # 2 of 10 ( Start time: 09:05:16 PM ) Total Marks: 1 Vertically wide data means: Select correct option: Dataset has large no. of attributes Dataset has large no. of records(CORRECT) Dataset has attribute skews Dataset has partitioning skews Question # 3 of 10 ( Start time: 09:05:43 PM ) Total Marks: 1 In ___________ phase of kimballs approach, we identify the components needed now and in future. Select correct option: Requirement definition Architectural design Product development Analytical application development Question # 4 of 10 ( Start time: 09:06:56 PM ) Total Marks: 1 Technical architecture design supports the communicat...
2 comments
Read more

CS614 Quiz No.3 Shared by Students (Solved), Spring 2014

______ index stores first value in each block in the sequential file and a pointer to the block.  Select correct option:   Dense  Sparse  B-Tree  Hash In context of data parallelism, the work done by query processor should be:  Select correct option:  Almost zero  Maximum  Pipelined  Filtered across partitions The optimizer uses a hash join to join two tables if they are joined using an equijoin and  Select correct option:   Outer table has less number of rows  Inner table has less number of rows  Cardinality of tables is equal  Large amount of data needs to be joined Bitmap index is appropriate for:  Select correct option:  Low cardinality data  High cardinality data  Clustered data  Aggregated data If a task takes “T” time units to execute on a single data item, then execution of this task on “N” data items will take __...
Post a Comment
Read more