A local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals. The stem-and-leaf plot of the data for one year is below. The leaf unit is 0.1.
$$\begin{array} { l l }
76 & 9 \
77 & 114 \
78 & \
79 & 07 \
80 & 88 \
81 & 2 \
82 & 1 \
83 & 88
\end{array}$$
-What is the sample size?
A)7
B)9
C)10
D)11
E)12

Question

A local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals. The stem-and-leaf plot of the data for one year is below. The leaf unit is 0.1.
$$\begin{array} { l l } 
76 & 9 \
77 & 114 \
78 & \
79 & 07 \
80 & 88 \
81 & 2 \
82 & 1 \
83 & 88
\end{array}$$
-What is the sample size?
A)7
B)9
C)10
D)11
E)12

Quizplus · Accepted Answer

The sample size is the total number of observations in the stem-and-leaf plot. Counting all the leaves gives us 12 observations.

A Local Airport Keeps Track of the Percentage of Flights 7697711478790780888128218388\begin{array} { l l } 76 & 9 \\77 & 114 \\78 & \\79 & 07 \\80 & 88 \\81 & 2 \\82 & 1 \\83 & 88\end{array}7677787980818283​911407882188​

A Local Airport Keeps Track of the Percentage of Flights $\begin{array} { l l } 76 & 9 \\77 & 114 \\78 & \\79 & 07 \\80 & 88 \\81 & 2 \\82 & 1 \\83 & 88\end{array}$