Question

irenes grocery bills for two years (24 months) had a standard deviation of $15. if the lowest bill was $100 and the highest was $140, what is the range of her grocery bills? $40 $45 $30 $35

Explanation:

Step1: Recall range formula

The range of a data - set is calculated as $Range = \text{Highest value}-\text{Lowest value}$.

Step2: Identify values

The lowest grocery bill is $\$100$ and the highest grocery bill is $\$140$.

Step3: Calculate range

$Range=140 - 100=40$.

Answer:

$40$