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There is substantial overlap between two sets of confidence intervals on an error bar chart. The chart shows confidence intervals for boys and girls on a depression questionnaire. What could we make of this?
If you have a negative z-score it will be below the mean.
Which of the following is the correct statement?
Sampling distributions tend to be what in shape?
Which of the following type of graph can display confidence intervals?
A sample mean is a ____ estimate and we do not know how close it is to the population mean.
To calculate confidence intervals we need make use of
In another study you have a standard deviation of 12, a mean of 20 and a sample size of 50. What is the standard error?
The standard error has been calculated as 2.6 and the sample mean is 10.00. Thus the 95% confidence interval lies between
Finally, you still have the same data (a sample size of 7, a mean of 8 and a standard deviation of 4.2) plus the standard error and you know how to calculate the 95% confidence interval. Thus what is the 95% confidence interval?
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