if for some reason it was not possible to obtain the 99% confidence interval from SPSS, how could the confidence interval be calculated by hand?
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- If a researcher found that the margin of error =0.9 and the sample mean from the study was 17.7, what is the upper bound confidence interval limit?What can we do to make a confidence interval narrower withoutchanging the confidence level?Suppose a different police department says their SRS resulted in a 95% confidence interval of 10.1% to 15.1%. What is their point estimator and margin of error?
- Suppose that a 95% confidence interval for the average number of minutes a regular customer uses with a cellphone in a month is 110 plus or minus 35 minutes. What are the lower and upper boundaries for this confidence interval?.If the confidence interval would only contain positive values, what would be your interpretation of this 95% confidence interval regarding this diet program?If a 90% confidence interval for the difference of means μ 1 − μ 2 contains all negative values, what can we conclude about the relationship between μ 1 and μ 2 at the 90% confidence level?