1.
There is a very high inverse relationship between measures of 'overweight' and 'life expectancy'. Which one of the following value of the coefficient of correlation is consistent with the statement?

2.
The formula to determine the number of classes given by Sturge's rule is which one of the following?
Where, $$K$$ = Number of classes
$$N$$ =Total number of observations
$$\left( {\log \,N} \right)$$  = Logarithm of the total number of observations

5.
A researcher wants to test the significance of the difference between the average performance of the two small sized samples when the information of the population standard deviation is not available, which one of the following hypothesis-testing is suitably used?

7.
If the dependent variable increases as the independent variable increases in an estimating equation, the coefficient of correlation will be inthe range:

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