TABLE 18-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows.
$$\begin{array} { c c l l }
\text { Day } & \text { Range } & \text { Mean } & \text { Std.Dev. } \
1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$$
-Referring to Table 18-8, an X chart is to be used for the time required to register. The lower control limit for this data set is , while the upper control limit is__________ .

Question

TABLE 18-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows.
 $$\begin{array} { c c l l } 
\text { Day } & \text { Range } & \text { Mean } & \text { Std.Dev. } \
1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$$ 
-Referring to Table 18-8, an X chart is to be used for the time required to register. The lower control limit for this data set is , while the upper control limit is__________ .

Quizplus · Accepted Answer

The Answer of TABLE 18-8
Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows.
 $$\begin{array} { c c l l } 
\text { Day } & \text { Range } & \text { Mean } & \text { Std.Dev. } \
1 & 10 & 5.250 & 3.4949 \
2 & 31 & 15.250 & 10.3060 \
3 & 13 & 20.375 & 4.9262 \
4 & 21 & 22.875 & 8.3911 \
5 & 35 & 8.500 & 11.3767 \
6 & 18 & 7.875 & 6.9372 \
7 & 25 & 11.250 & 8.5815 \
8 & 30 & 7.875 & 9.5235 \
9 & 17 & 10.250 & 6.3640 \
10 & 22 & 9.500 & 7.8740 \
11 & 27 & 7.875 & 8.7086 \
12 & 26 & 12.875 & 9.3723
\end{array}$$ 
-Referring to Table 18-8, an X chart is to be used for the time required to register. The lower control limit for this data set is , while the upper control limit is__________ .

TABLE 18-8 Recently, a University Switched to a New Type

TABLE 18-8
Recently, a University Switched to a New Type