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A set of data items is normally distributed with a mean of 150 and a standard deviation of 20. Convert 110 to a z-score
1 answer:
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Answer:
The 99% confidence interval is
Step-by-step explanation:
From the question we are told that
The sample size is
The sample mean is
The standard deviation is
Given that confidence is 99% then the level of significance is mathematically represented as
Next we obtain the critical values of from the normal distribution table
The value is
Generally the margin for error is mathematically represented as
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The 99% confidence interval is mathematically represented as
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