A random sample of 27 items is drawn from a population whose standard deviation is unknown. The sample mean is x¯ = 940 and the
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Answer:
The sample size is
Step-by-step explanation:
From the we are told that
The population proportion is p = 0.90
The margin of error is E = 0.01
From the question we are told the confidence level is 95% , hence the level of significance is
=>
Generally the sample size is mathematically represented as
=>
=>