Answer :
The sample size should be 24.
What is the sample size?
The process of deciding how many observations or replicates to include in a statistical sample is known as sample size determination. Any empirical study with the aim of drawing conclusions about a population from a sample must take into account the sample size as a crucial component.
Here, we have
Given
Margin of error = 300
confidence level = 0.9
standard deviation = 900
Assuming the standard deviation to be of population
ME = Z(0.1/2) × σ/√n
300 = 1.645 × 900/√n
n = {(1.645 × 900)300}²
n = 24
Hence, the sample size should be 24.
To learn more about the sample size from the given link
https://brainly.com/question/24158610
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