Statistical study and data interpretation test, 12 grade

Question Nr. 1 out of 10

Find the mean of: 8, 10, 12, 14, 16.

12

4

1

30

26

Question Nr. 2 out of 10

Standard deviation is 6. Every value is multiplied by 5. What is the new standard deviation?

5

14

40

44

30

Question Nr. 3 out of 10

A linear model has R² = 0.49. What percentage of data variation is explained?

78 %

34 %

20 %

5 %

49 %

Question Nr. 4 out of 10

How can an outlier affect statistical analysis?

It always proves causation

It can strongly change the mean, standard deviation and fitted line

It never affects analysis

It changes only sample size

Question Nr. 5 out of 10

What conclusion about causation does correlation permit?

Every correlation is causal

A large sample proves causation

Negative correlation means no relation

Correlation alone does not establish causation

Question Nr. 6 out of 10

What is a logical sequence of stages in a statistical study?

Graph only

Question, data collection, analysis, interpretation and conclusion

Collect unrelated data

Conclusion before data

Question Nr. 7 out of 10

What conclusion about causation does correlation permit?

A large sample proves causation

Negative correlation means no relation

Every correlation is causal

Correlation alone does not establish causation

Question Nr. 8 out of 10

What type of variable is precisely measured human height?

Quantitative continuous variable

A constant

Qualitative nominal variable

Qualitative ordinal variable

Question Nr. 9 out of 10

Some school students were surveyed. What are the surveyed group and all school students called?

Both are populations

The surveyed students are the sample; all school students are the population

The terms are interchangeable

Both are samples

Question Nr. 10 out of 10

A linear model has R² = 0.81. What percentage of data variation is explained?

9 %

27 %

81 %

92 %

78 %

Test: Statistical study and data interpretation

Question Nr. 1 out of 10

Question Nr. 2 out of 10

Question Nr. 3 out of 10

Question Nr. 4 out of 10

Question Nr. 5 out of 10

Question Nr. 6 out of 10

Question Nr. 7 out of 10

Question Nr. 8 out of 10

Question Nr. 9 out of 10

Question Nr. 10 out of 10

Sample questions

Test: Statistical study and data interpretation

Question Nr. 1 out of 10

Question Nr. 2 out of 10

Question Nr. 3 out of 10

Question Nr. 4 out of 10

Question Nr. 5 out of 10

Question Nr. 6 out of 10

Question Nr. 7 out of 10

Question Nr. 8 out of 10

Question Nr. 9 out of 10

Question Nr. 10 out of 10

Sample questions

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