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Question
	
Quiz 2 Numerical descriptive statistics and
sampling










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1. The following marks are the test 1 marks
for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 55, 80, 49, 91,
66. What is the mean mark for this
sample?

a. 69.1

b. 69.4



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c. 62.2

d. 70.3

e. 71.5



2. The following marks are the test 1 marks
for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 52, 80, 49, 91,
66. What is the mean mark for this
sample?

a. 69.1

b. 69.4

c. 62.2

d. 70.3

e. 71.5



3. The following marks are the test 1 marks
for 10 randomly selected STA100 students: 67, 34, 98, 78, 76, 55, 80, 49, 19,
66. What is the mean mark for this
sample?

a. 69.1

b. 69.4

c. 62.2

d. 70.3

e. 71.5



4. The following marks are the test 1 marks
for 10 randomly selected STA100 students: 67, 43, 98, 78, 76, 55, 80, 49, 91,
66. What is the mean mark for this
sample?

a. 69.1

b. 69.4

c. 62.2

d. 70.3

e. 71.5



5. The average mark on a stats test for a
class of 25 students was 75%. If the 15
female students in the class averaged 70%, then what did the male students in
the class average?

a. 82.5%

b. 79.5%

c. 63.0%

d. 79.6%

e. 71.5%



6. The average mark on a stats test for a
class of 25 students was 75%. If the 15
female students in the class averaged 72%, then what did the male students in
the class average?

a. 82.5%

b. 79.5%

c. 63.0%

d. 79.6%

e. 71.5%



7. The average mark on a stats test for a
class of 25 students was 75%. If the 15
female students in the class averaged 83%, then what did the male students in
the class average?

a. 82.5%

b. 79.5%

c. 63.0%

d. 79.6%

e. 71.5%



8. The average mark on a stats test for a
class of 25 students was 75%. If the 12
female students in the class averaged 70%, then what did the male students in
the class average?

a. 82.5%

b. 79.5%

c. 63.0%

d. 79.6%

e. 71.5%



9. The average mark on a stats test for a
class of 25 students was 73%. If the 15
female students in the class averaged 70%, then what did the male students in
the class average?

a. 77.5%

b. 80.0%

c. 90.0%

d. 51.0%

e. 71.5%



10. The average mark on a stats test for a
class of 30 students was 75%. If the 15
female students in the class averaged 70%, then what did the male students in
the class average?

a. 77.5%

b. 80.0%

c. 90.0%

d. 51.0%

e. 71.5%



11. The average mark on a stats test for a
class of 25 students was 78%. If the 15
female students in the class averaged 70%, then what did the male students in
the class average?

a. 77.5%

b. 80.0%

c. 90.0%

d. 51.0%

e. 71.5%



12. The average mark on a stats test for a
class of 25 students was 75%. If the 15
female students in the class averaged 91%, then what did the male students in
the class average?

a. 77.5%

b. 80.0%

c. 90.0%

d. 51.0%

e. 71.5%



13. The average final exam mark for a class
of 15 stats students was 84%. However,
soon after this average was calculated, it was discovered that one of the marks
was incorrectly recorded as 75%, when it was in fact 57%. If the marks are corrected, what would the
new class average be?

a. 82.8%

b. 83.1%

c. 78.8%

d. 82.5%

e. 71.5%



14. The average final exam mark for a class
of 20 stats students was 84%. However,
soon after this average was calculated, it was discovered that one of the marks
was incorrectly recorded as 75%, when it was in fact 57%. If the marks are corrected, what would the
new class average be?

a. 82.8%

b. 83.1%

c. 78.8%

d. 82.5%

e. 71.5%



15. The average final exam mark for a class
of 15 stats students was 80%. However,
soon after this average was calculated, it was discovered that one of the marks
was incorrectly recorded as 75%, when it was in fact 57%. If the marks are corrected, what would the
new class average be?

a. 82.8%

b. 83.1%

c. 78.8%

d. 82.5%

e. 71.5%



16. The average final exam mark for a class
of 15 stats students was 84%. However,
soon after this average was calculated, it was discovered that one of the marks
was incorrectly recorded as 80%, when it was in fact 57%. If the marks are corrected, what would the
new class average be?

a. 82.8%

b. 83.1%

c. 78.8%*d. 82.5%

e. 71.5%



17. The average final exam mark for a class
of 15 stats students was 84%. However,
soon after this average was calculated, it was discovered that one of the marks
was incorrectly recorded as 75%, when it was in fact 70%. If the marks are corrected, what would the
new class average be?

a. 83.7%

b. 84.4%

c. 82.4%

d. 83.3%

e. 71.5%



18. The average final exam mark for a class
of 15 stats students was 84%. However,
soon after this average was calculated, it was discovered that one of the marks
was incorrectly recorded as 75%, when it was in fact 81%. If the marks are corrected, what would the
new class average be?

a. 83.7%

b. 84.4%

c. 82.4%

d. 83.3%

e. 71.5%



19. The average final exam mark for a class
of 15 stats students was 84%. However,
soon after this average was calculated, it was discovered that one of the marks
was incorrectly recorded as 81%, when it was in fact 57%. If the marks are corrected, what would the
new class average be?

a. 83.7%

b. 84.4%

c. 82.4%

d. 83.3%

e. 71.5%



20. The average final exam mark for a class
of 25 stats students was 84%. However,
soon after this average was calculated, it was discovered that one of the marks
was incorrectly recorded as 75%, when it was in fact 57%. If the marks are corrected, what would the
new class average be?

a. 83.7%

b. 84.4%

c. 82.4%

d. 83.3%

e. 71.5%



21. The following ages are those of 15
people interviewed at the Ster-Kinekor movie theatres in Canal Walk shopping
centre: 12, 14, 15, 19, 19, 21, 27, 31, 32, 46, 53, 56, 57, 58, 59. What is the sum of the median and the mode?

a. 50

b. 64

c. 52

d. 87

e. 51



22. The following ages are those of 15
people interviewed at the Ster-Kinekor movie theatres in Canal Walk shopping
centre: 12, 14, 15, 19, 19, 21, 27, 32, 32, 32, 53, 56, 57, 58, 59. What is the sum of the median and the mode?

a. 50

b. 64

c. 52

d. 87

e. 51



23. The following ages are those of 15
people interviewed at the Ster-Kinekor movie theatres in Canal Walk shopping
centre: 12, 14, 15, 18, 19, 21, 21, 31, 32, 46, 53, 56, 57, 58, 59. What is the sum of the median and the mode?

a. 50

b.64

c. 52

d. 87

e. 51



24. The following ages are those of 15
people interviewed at the Ster-Kinekor movie theatres in Canal Walk shopping
centre: 12, 14, 15, 19, 19, 21, 27, 31, 32, 46, 53, 56, 56, 56, 59. What is the sum of the median and the mode?

a. 50

b. 64

c. 52

d. 87

e. 51



25.Given the following data set, calculate the sum of the mean, median
and mode: 5, 3, 10, 4, 2, 3

a. 11.5

b. 12

c. 13.5

d. 11

e. 12.5



26. Given the following data set,
calculate the sum of the mean, median and mode:
5, 3, 10, 4, 11, 3

a. 11.5

b. 12

*c. 13.5

d. 11

e. 12.5



27. Given the following data set,
calculate the sum of the mean, median and mode:
8, 3, 10, 4, 2, 3

a. 11.5

b. 12

c. 13.5

d. 11

e. 12.5



28. Given the following data set,
calculate the sum of the mean, median and mode:
5, 3, 10, 7, 2, 3

a. 11.5

b. 12

c. 13.5

d. 11

e. 12.5