B. I and II
Explanation:
I. Region 1 has a greater mean than region 2: This statement is true if the dots in region 1 are on average higher than the dots in region 2.
II. Region 2 has a greater median than region 1: This statement is true if the middle dot in region 2 is higher than the middle dot in region 1.
III. Region 1 has a greater interquartile range than region 2: The interquartile range is the range of the middle 50% of the data. This statement is not necessarily true based on the dot plots alone.
IV. Region 2 has a greater standard deviation than region 1: The standard deviation measures the spread of data around the mean. This statement is not necessarily true based on the dot plots alone.
The dot plots represent the cost of first-year college tuitions for two different U.S. regions. Which of the statements are true?
I. Region 1 has a greater mean than region 2.
II. Region 2 has a greater median than region 1.
III. Region 1 has a greater interquartile range than region 2.
IV. Region 2 has a greater standard deviation than region 1.
A.
I and III
B.
I and II
C.
III and IV
D.
II and IV
1 answer
1 answer