Latest 2024/2025 BSNS112 Actual Exam/Test Bank Questions
With Verified Answers{100%correct}Graded A+
1. What does quantitative data use? Means
2. What is discrete data? Quantitative. Measured in specific val-
ues
3. What is continuous data? Quantitative. Measure in infinite val-
ues
4. What does qualitative data use? Proportions
5. What is ordinal data? Qualitative. Conveys a ranking
6. What is nominal data? Qualitative. Uses labels (no ranking)
7. What variables does a cross tabu- Categorical and categorical
lation table use?
8. What variables does a scatter plot Numerical and numerical
use?
9. What variable(s) does a frequency One categorical variable
table use?
10. What variables does a Categorical and categorical
stacked/clustered bar chart use?
11. What variables does a relative fre- Categorical and numerical
quency histogram use?
12. Define mean Simple average
13. Define median Middle value when data is ranked
14. Define mode Most frequent value
15. Define trimmed mean Average when most extreme 5% of
data is cut
16. Define range maximum - minimum
, BSNS112
17. Define interquartile range 75th percentile - 25th percentile
18. Define variance spread of data around mean (ò)
19. What happens when standard devi- Graph widens
ation increases?
20. Define coefficient of variation Compares variability between groups
with different magnitudes
21. Coefficient of variation equation SD / x where x is the sample mean
22. What does it mean by a positively Tail trails to the right. Mean > Median
skewed graph? > Mode
23. What does it mean by a negative Tail trails to the left. Mode > Median >
skewed graph? Mean
24. When is a graph significantly Skewness more than twice the stan-
skewed? dard error
25. Define kurtosis Measure of the extent to which obser-
vations cluster around a central point
26. What is the normal distribution kur- 0
tosis value?
27. Define positive kurtosis Data clusters more in the centre
28. Define negative kurtosis Data clusters less in the centre
29. How is cross-sectional data col- By observing many subjects at the
lected? same point of time, or without regard
to differences in time
30. What is time-series data? A sequence taken at successive
equally spaced points in time (dis-
crete-time data)
31. Define association How one variable relates to another
, BSNS112
32. Define covariance Measure of the co-movement be-
tween 2 variables (measured in units)
33. Define positive covariance 2 variables move in the same direction
34. Define negative covariance 2 variables move in the opposite direc-
tion
35. Define the correlation coefficient Measure of the linear relationship be-
tween 2 variables (scaled to equal a
value between -1 and +1)
36. Define positive correlation 2 variables move in the same linear
direction
37. Define negative correlation 2 variables move in the opposite linear
direction
38. Define parameter A summary measure that describes a
characteristic of the population
39. Define statistic A summary measure that describes a
characteristic of a sample
40. Define simple random sampling Everyone is equally likely to be cho-
sen from a population
41. Define systematic random sam- Selecting 1 individual from a group
pling and choosing the kth individual there-
after
42. Define stratified random sampling Dividing the population into homoge-
nous groups of similar characteristics
and selecting a random sample from
each group
43. Define cluster sampling Dividing the population into sever-
al clusters (that aren't homogenous),
and taking a random sample from
each cluster
With Verified Answers{100%correct}Graded A+
1. What does quantitative data use? Means
2. What is discrete data? Quantitative. Measured in specific val-
ues
3. What is continuous data? Quantitative. Measure in infinite val-
ues
4. What does qualitative data use? Proportions
5. What is ordinal data? Qualitative. Conveys a ranking
6. What is nominal data? Qualitative. Uses labels (no ranking)
7. What variables does a cross tabu- Categorical and categorical
lation table use?
8. What variables does a scatter plot Numerical and numerical
use?
9. What variable(s) does a frequency One categorical variable
table use?
10. What variables does a Categorical and categorical
stacked/clustered bar chart use?
11. What variables does a relative fre- Categorical and numerical
quency histogram use?
12. Define mean Simple average
13. Define median Middle value when data is ranked
14. Define mode Most frequent value
15. Define trimmed mean Average when most extreme 5% of
data is cut
16. Define range maximum - minimum
, BSNS112
17. Define interquartile range 75th percentile - 25th percentile
18. Define variance spread of data around mean (ò)
19. What happens when standard devi- Graph widens
ation increases?
20. Define coefficient of variation Compares variability between groups
with different magnitudes
21. Coefficient of variation equation SD / x where x is the sample mean
22. What does it mean by a positively Tail trails to the right. Mean > Median
skewed graph? > Mode
23. What does it mean by a negative Tail trails to the left. Mode > Median >
skewed graph? Mean
24. When is a graph significantly Skewness more than twice the stan-
skewed? dard error
25. Define kurtosis Measure of the extent to which obser-
vations cluster around a central point
26. What is the normal distribution kur- 0
tosis value?
27. Define positive kurtosis Data clusters more in the centre
28. Define negative kurtosis Data clusters less in the centre
29. How is cross-sectional data col- By observing many subjects at the
lected? same point of time, or without regard
to differences in time
30. What is time-series data? A sequence taken at successive
equally spaced points in time (dis-
crete-time data)
31. Define association How one variable relates to another
, BSNS112
32. Define covariance Measure of the co-movement be-
tween 2 variables (measured in units)
33. Define positive covariance 2 variables move in the same direction
34. Define negative covariance 2 variables move in the opposite direc-
tion
35. Define the correlation coefficient Measure of the linear relationship be-
tween 2 variables (scaled to equal a
value between -1 and +1)
36. Define positive correlation 2 variables move in the same linear
direction
37. Define negative correlation 2 variables move in the opposite linear
direction
38. Define parameter A summary measure that describes a
characteristic of the population
39. Define statistic A summary measure that describes a
characteristic of a sample
40. Define simple random sampling Everyone is equally likely to be cho-
sen from a population
41. Define systematic random sam- Selecting 1 individual from a group
pling and choosing the kth individual there-
after
42. Define stratified random sampling Dividing the population into homoge-
nous groups of similar characteristics
and selecting a random sample from
each group
43. Define cluster sampling Dividing the population into sever-
al clusters (that aren't homogenous),
and taking a random sample from
each cluster
