Find $\mathrm { s } _ { \mathrm { d } }$

question 70

Multiple Choice

Find $\mathrm { s } _ { \mathrm { d } }$ Assume the samples are random and dependent, and the populations are normally distributed. $$\begin{array} { c | l l l l l } \text { A } & 27 & 25 & 44 & 40 & 28 \\\hline \text { B } & 25 & 21 & 22 & 32 & 19\end{array}$$

• A)7.8
• B)5.6
• C)6.8
• D)8.9

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