A test of driving ability is given to a random sample of 10 student drivers before and after they complete a formal driver education course. Results are shown in the table below. Using P-value approach, test the hypothesis that there is no difference between the before-class scores and the after-class scores at α = 0.05.  Student Before Class After Class 1 100 136 2 121 129 3 93 125 4 146 150 5 101 110 6 109 138 7 149 136 8 130 130 9 127 125 10 120 129   Step 1: State the hypothesis   Step 2: State the decision rule   Step 3: Find the P-value   Step 4: Make decision   Step 5: Conclusion

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Q: Age/Preference Alcohol Soft drink Coffee/tea Total 21-39 66 76 47 189 40-65 56 72 56 184 Over 65…

A:

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.