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Vika [28.1K]
4 years ago
10

In a completely randomized design involving three treatments, the following information is provided: Treatment 1 Treatment 2 Tre

atment 3 Sample Size 5 10 5 Sample Mean 4 8 9 The overall mean for all the treatments is a. 7.00 b. 6.67 c. 7.25 d. 4.89
Mathematics
1 answer:
Sever21 [200]4 years ago
8 0

Answer:

c. 7.25

Step-by-step explanation:

Given the following information from an experiment:

\left\begin{array}{ccc}&$Sample Size&$Sample Mean \\$Treatment 1&5&4\\$Treatment 2&10&8\\$Treatment 3&5&9\end{array}\right

Total Sample Size =5+10+5=20

Therefore, the overall mean

=\dfrac{(5 \times 4)+ (10 \times 8) + (5 \times 9)}{20} \\=\dfrac{145}{20}\\\\=7.25

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