angieinthehouse45
12.12.2020 •
Mathematics
[9] X is a Gaussian random variable with variance 0.25. The mean of X is estimated by taking the sample mean of independent samples of X. If the mean needs to be estimated within 0.01 from the actual mean with a confidence coefficient of 0.99, find the minimum number of samples needed in the estimation.
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Ответ:
The minimum number of samples required is
Step-by-step explanation:
From the question we are told that
The variance is
The margin of error is
From the question we are told the confidence coefficient is 0.99 , hence the level of significance is
=>
Generally from the normal distribution table the critical value of is
Generally the standard deviation is
=>
=>
Generally the sample size is mathematically represented as
=>
=>
Ответ: