Find the volume of the cube 8cm
2 answers:
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Answer:
The general formula for the margin of error is given by:
And for this case the width is:
And if we decrease the confidence level from 95% to 90% then the critical value would decrease and in effect the width for this new confidence interval decreases.
As confidence level decreases, the interval width decreases
Step-by-step explanation:
For this cae we know that the sample size selected is n =41
And we have a confidence interva for the true mean of foot length for students at a college selected.
The confidence interval is given by this formula:
And for this case the 95% confidence interval is given by: (21.71,25.09)
A point of etimate for the true mean is given by:
And the margin of error would be:
The general formula for the margin of error is given by:
And for this case the width is:
And if we decrease the confidence level from 95% to 90% then the critical value would decrease and in effect the width for this new confidence interval decreases.
As confidence level decreases, the interval width decreases
plug that in your calculator, make sure the calculator is in Degree mode