The 95% confidence interval because decreasing the confidence level improves the precisionm, and vice versa.
Question
Suppose that you have obtained data by taking a random sample from a population and that you intend to find a confidence interval for the population m
Answers (1)
2021-06-25
Relevant Questions
asked 2021-06-01
Suppose that you take 500 simple random samples from a population and that, for each sample, you obtain a 90% confidence interval for an unknown parameter. Approximately how many of those confidence intervals will not contain the value of the unknown parameter?
asked 2021-05-09
If you have a 99% confidence interval for \(\mu;\mu\); based on a simple random sample, is it correct to say that in the long run, if you computed many, many confidence intervals using the prescribed method, about 99% of such intervals would contain \(\mu\);? Explain.
asked 2021-08-10
A local firm manufactures LED products that have a lifespan that is approximately normally distributed with a std. dev. of 30 hours. If a sample of 30 LED products has an average lifespan of 780 hours, find a \(\displaystyle{96}\%\) confidence interval for the population mean of all LED products produced by this firm.
Choose 2 answers in nearest unit (ones) or in whole number.
Example, if your answer is \(\displaystyle{888.83}\leq\mu\leq{899.56}\), choose 889 and 900.
\(\begin{array}{|c|c|}\hline 775 & 773 & 807 & 797 & 791 & 769 & 789 & 768 & 805 & 763 & 771 & 792 \\ \hline \end{array}\)
asked 2021-05-25
Suppose we have two independent random variables x1 and x2 with respective population means μ1 and μ2. Let us say that we use sample data to construct two 80% confidence intervals. Confidence Interval amp; Confidence Level A1 lt;μ1 lt;B1 amp;0.80
A2 lt;μ2 lt;B2 amp;0.80
Now, what is the probability that both intervals hold at the same time? Use methods to show that
P(A1<μ1
