If 2+x=8, what is the value of x?
2 answers:
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Answer:
The 99% confidence interval for the mean commute time of all commuters in Washington D.C. area is (22.35, 33.59).
Step-by-step explanation:
The (1 - <em>α</em>) % confidence interval for population mean (<em>μ</em>) is:
Here the population standard deviation (σ) is not provided. So the confidence interval would be computed using the <em>t</em>-distribution.
The (1 - <em>α</em>) % confidence interval for population mean (<em>μ</em>) using the <em>t</em>-distribution is:
Given:
*Use the <em>t</em>-table for the critical value.
Compute the 99% confidence interval as follows:
Thus, the 99% confidence interval for the mean commute time of all commuters in Washington D.C. area is (22.35, 33.59).
Assignment:
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Answer:
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Explanation:
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[ Step One ] Subtract 12 From Both Sides
[ Step Two ] Simplify
[ Step Three ] Subtract 8x From Both Sides
[ Step Four ] Simplify
[ Step Five ] Divide Both Sides By 3
[ Step Six ] Simplify
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