8,155 to the nearest thousand
2 answers:
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Answer:
The 95% confidence interval is
Step-by-step explanation:
From the question we are told that
The sample mean difference is
The standard error is SE = 0.03
Given that the confidence interval is 95% then the level of significance is mathematically evaluated as
Next we obtain the critical value of from the normal distribution table, the value is
Generally the margin of error is mathematically represented as
substituting values
The 95% confidence interval is mathematically represented as
substituting values