Descriptive statistics is used _____

a) To develop information regarding the product sample using the measured data

b) To measure the data for a sample

c) To draw conclusions about the population

d) To control the variation

3. Which of these shows the ordered Stem-and-Leaf Plot?

a) Stems arranged by magnitude

b) Stems not arranged by magnitude

c) Stems and the leaves, both arranged by magnitude

d) Neither stems nor leaves are arranged by magnitude

4. The median for an odd number of observations is _________ where n is the number of observations.

a) [(n-1)/2 + 1] rank on the ascending order of observations

b) [(n+1)/2 + 1] rank on the ascending order of observations

c) Average of [(n+1) / 2] and (n/2) rank on the ascending order of observations

d) (n/2) rank on the ascending order of observations

5. For even number of observations of a data distribution, what is the median?

a) [(n-1)/2 + 1] rank on the ascending order of observations

b) (n/2) rank on the ascending order of observations

c) Average of (n/2)th observation and (n/2 + 1)th observation

d) Average of [(n+1) / 2] and (n/2) rank on the ascending order of observations

6. IQR is defined as ____________

a) difference between fourth and first quartile

b) difference between fourth and third quartile

c) difference between third and first quartile

d) difference between second and first quartile

7. In stem-and-leaf plot, the measure of variability is _____________

a) IQR

b) Mean

c) Median

d) Third quartile

8. Which of these, does not take time order of observations into account?

a) Time series plot

b) Run chart

c) Marginal plot

d) Stem-and-leaf plot

9. Which of these is not the name of the intervals created for the construction of the histogram?

a) Class intervals

b) Cells

c) Bins

d) Boxes

10. For a set of data having 100 observations, how many bins must be created for satisfactory results of histogram?

a) 25

b) 10

c) 28

d) 4