Answer:
Elena had the greater mean test score
Betsy and Elena has the same median score
Elena had the greater interquartile range
Explanation:
Elena scored 75, 85, 85, 90, and 95
The mean is (75+85+85+90+95)/ 5 =430/5 = 86
The median is the middle number when in order from smallest to largest = 85
The IQR is IQ3 - IQ1 =
The IQ3 is the middle of the upper half which is (90+95)/2 = 92.5
IQ1 = (75+85)/2 = 80
IQ3 -IQ1 = 92.5-80 = 12.5
Betsy scored 84, 84, 85, 86, and 86
The mean is (84+84+85+86+86)/ 5=425/5 = 85
The median is the middle number when in order from smallest to largest = 85
The IQR is IQ3 - IQ1 =
The IQ3 is the middle of the upper half which is (86+86)/2 = 86
IQ1 = (84+84)/2 = 8
IQ3 -IQ1 = 86-84 = 2
Elena had the greater mean test score
Betsy and Elena has the same median score
Elena had the greater interquartile range