A foreman wants to use an $\overline { \mathrm { X } }$
Chart to control the average length of the bolts manufactured.He has recently collected the six samples given below. $$\begin{array} { c c c c c }
\text { Sample } & & & & \
1 & 1.99 & 2.01 & 2.02 & 2.02 \
2 & 2.00 & 2.00 & 2.01 & 2.01 \
3 & 1.98 & 1.99 & 2.01 & 1.98 \
4 & 2.01 & 2.02 & 2.02 & 1.99 \
5 & 1.99 & 1.99 & 2.01 & 1.99 \
6 & 2.03 & 1.98 & 2.03 & 2.04
\end{array}$$
Calculate the mean of the means $\overline { \overline X }$
)
A)2.010
B)2.406
C)2.000
D)2.005

Question

A foreman wants to use an $\overline { \mathrm { X } }$
Chart to control the average length of the bolts manufactured.He has recently collected the six samples given below. $$\begin{array} { c c c c c } 
\text { Sample } & & & & \
1 & 1.99 & 2.01 & 2.02 & 2.02 \
2 & 2.00 & 2.00 & 2.01 & 2.01 \
3 & 1.98 & 1.99 & 2.01 & 1.98 \
4 & 2.01 & 2.02 & 2.02 & 1.99 \
5 & 1.99 & 1.99 & 2.01 & 1.99 \
6 & 2.03 & 1.98 & 2.03 & 2.04
\end{array}$$
Calculate the mean of the means $\overline { \overline X }$
)
A)2.010
B)2.406
C)2.000
D)2.005

Quizplus · Accepted Answer

The mean of each sample is calculated and then averaged: (2.01 + 2.005 + 1.99 + 2.01 + 1.995 + 2.02) / 6 = 2.005.

A Foreman Wants to Use An X‾\overline { \mathrm { X } }X

A Foreman Wants to Use An $\overline { \mathrm { X } }$