Question

1. An IQ test typically rates people according to a(n) ________ scale.

a.) nominal

b.) interval

c.)ratio

d.) ordinal

2. Which of the following could be a correlation coefficient?

a.) -.5

b.) 99%

c.) 27%

d.) +1.5

3. TRUE OR FALSE: Maritial status represents a quantitative variable.      

4.TRUE OR FALSE: The measures of kurtosis tell us how flat or steep a curve is relative to the normal curve.      

5. TRUE OR FALSE: The coefficient of determination can never be negative.      

6. TRUE OR FALSE: The sign of the correlation coefficient indicates the direction of the relationship.      

Answer 1

1) if we conduct a test on IQ we can arrange the students according to their ranks.so the ranks can be measured based on the ordinal scale

Ans : ordinal

2) the correlation coefficient r cna be lies between -1 and +1

If the value of r = -0.5 then there is a moderate c negative between two variables.

Ans : -0.5

3) marital status can be answered either yes or no.this is a qualitative variable.

A quantitative variable can be measured in numbers.

And : false

4) yes , the kurtosis can be used to measure the falttedness or peaked of the normal curve .

And : true.

5) yes it can't be negative since it's a square value.

And : True

6) yes , the sign indicates the direction

If r had negative sign then it's negative correlation

If r had positive sign the it's positive correlation.

True