STAT 200 EXAM REVIEW QUESTIONS
WITH CORRECT ANSWERS
Which of the following is not a continuous variable?
A) weight
B) number of siblings
C) age
D) temperature - CORRECT ANSWER-✔✔✅B) number of siblings
What is the median of the following data?
3, 3, 4, 2, 1, 5, 1, 2, 2
A) 2
B) (2+3) / 2, or 2.5
C) 1
D) (3+3+4+2+1+5+1+2+2) / 9, or 2.56 - CORRECT ANSWER-✔✔✅A) 2
What is the range of the following data?
3, 3, 4, 2, 1, 5, 1, 2, 2
A) 3-2, or 1
B) 1 to 5
C) 5-1, or 4
D) 2 to 3 - CORRECT ANSWER-✔✔✅C) 5-1, or 4
What is the IQR of group 0?
,A) 77 - 22, or 55
B) 68.5 - 39.25, or 29.25
C) 66 - 36, or 30
D) 80 - 20, or 60 - CORRECT ANSWER-✔✔✅66 - 36, or 30
minitab output: Q3-Q1
What interval below, by definition, covers the middle 50% of the data?
A) 20 to 53
B) 36.5 to 67
C) 36.5 to 80
D) 20 to 67 - CORRECT ANSWER-✔✔✅B) 36.5 to 67
mini tab output: middle 50%= Q1 through Q3
What interval below, by definition, covers the lower 50% of the data?
A) 20 to 67
B) 20 to 53
C) 36.5 to 67
D) 36.5 to 80 - CORRECT ANSWER-✔✔✅B) 20 to 53
lower 50%= minimum through median
Suppose the maximum data point 10 was accidently written as 100 in the sample below.
3, 10, 3, 4, 2, 1, 5, 1, 2, 2
, Which of the following will change?
A) standard deviation
B) median
C) Q1
D) Q3 - CORRECT ANSWER-✔✔✅A) standard deviation
sensitive stat
If data are bell-shaped, which of the following is most likely to be true?
A) the mean and the median are nearly the same
B) the mean is greater than the median
C) the median does not exist
D) the mean is less than the median - CORRECT ANSWER-✔✔✅A) the mean and the median are
nearly the same
Which of the following best describes the shape of the two groups of data?
A) group 0 is skewed and group 1 is bell-shaped
B) both group 0 and group 1 are skewed
C) group 0 is bell-shaped and group 1 is skewed
D) both group 0 and group 1 are bell-shaped - CORRECT ANSWER-✔✔✅D) both group 0 and group 1
are bell-shaped
because in mini tab the median and mean are very similar
Consider two bell-shaped curves on one graph.
The first has a mean of 85 and standard deviation of 15.
The second has a mean of 75 and standard deviation of 5.
WITH CORRECT ANSWERS
Which of the following is not a continuous variable?
A) weight
B) number of siblings
C) age
D) temperature - CORRECT ANSWER-✔✔✅B) number of siblings
What is the median of the following data?
3, 3, 4, 2, 1, 5, 1, 2, 2
A) 2
B) (2+3) / 2, or 2.5
C) 1
D) (3+3+4+2+1+5+1+2+2) / 9, or 2.56 - CORRECT ANSWER-✔✔✅A) 2
What is the range of the following data?
3, 3, 4, 2, 1, 5, 1, 2, 2
A) 3-2, or 1
B) 1 to 5
C) 5-1, or 4
D) 2 to 3 - CORRECT ANSWER-✔✔✅C) 5-1, or 4
What is the IQR of group 0?
,A) 77 - 22, or 55
B) 68.5 - 39.25, or 29.25
C) 66 - 36, or 30
D) 80 - 20, or 60 - CORRECT ANSWER-✔✔✅66 - 36, or 30
minitab output: Q3-Q1
What interval below, by definition, covers the middle 50% of the data?
A) 20 to 53
B) 36.5 to 67
C) 36.5 to 80
D) 20 to 67 - CORRECT ANSWER-✔✔✅B) 36.5 to 67
mini tab output: middle 50%= Q1 through Q3
What interval below, by definition, covers the lower 50% of the data?
A) 20 to 67
B) 20 to 53
C) 36.5 to 67
D) 36.5 to 80 - CORRECT ANSWER-✔✔✅B) 20 to 53
lower 50%= minimum through median
Suppose the maximum data point 10 was accidently written as 100 in the sample below.
3, 10, 3, 4, 2, 1, 5, 1, 2, 2
, Which of the following will change?
A) standard deviation
B) median
C) Q1
D) Q3 - CORRECT ANSWER-✔✔✅A) standard deviation
sensitive stat
If data are bell-shaped, which of the following is most likely to be true?
A) the mean and the median are nearly the same
B) the mean is greater than the median
C) the median does not exist
D) the mean is less than the median - CORRECT ANSWER-✔✔✅A) the mean and the median are
nearly the same
Which of the following best describes the shape of the two groups of data?
A) group 0 is skewed and group 1 is bell-shaped
B) both group 0 and group 1 are skewed
C) group 0 is bell-shaped and group 1 is skewed
D) both group 0 and group 1 are bell-shaped - CORRECT ANSWER-✔✔✅D) both group 0 and group 1
are bell-shaped
because in mini tab the median and mean are very similar
Consider two bell-shaped curves on one graph.
The first has a mean of 85 and standard deviation of 15.
The second has a mean of 75 and standard deviation of 5.
