Instruction 2-16
Given Below Is the Stem-And-Leaf Display Representing the Amount

question 177

Short Answer

Instruction 2-16
Given below is the stem-and-leaf display representing the amount of detergent used in litres (with leaves in 10ths of litres)in a month by 25 drive-through car wash operations in Auckland.
$$\begin{array} { l l } 9 | 147 \\10 | 02238 \\11 | 135566777 \\12 | 223489 \\13 | 02\end{array}$$
-Referring to Instruction 2-16,if a relative frequency or percentage distribution for the detergent data is constructed,using "9.0 but less than 9.9 litres" as the first class,________ percent of drive-through car wash operations use at least 10 litres of detergent in a month.

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