Chapter 3 - EST3

In the Wilcoxon test, the samples are...

• Paired

• Independent

In the Wilcoxon test, scales should be at least...

• interval

• ordinal

• nominal

The sales from 4 stores were registered before and after a discount experiment. We intend to know if there is evidence that there is an increase in the level of sales after the discount experiment. Which test should be used?

• Wilcoxon

• Mann-Whitney

• Quantile

Two friends decided to record the time (in hours) they spent watching Netflix per day. Data is presented above. They want to test if one of them tends to spend more time watching Netflix than the other. Which type of test should they apply?

• Wilcoxon

• Mann-Whitney

• Quantile

The maximum velocity (km/h) of vehicles that have passed on a given street was registered.

We intend to know if there is a certain time on the day (morning or afternoon) when the velocities tend to be higher. Note: none of the vehicles passed on the street more than once per day.

• Wilcoxon test

• Mann-Whitney test

• Quantile test

Which of the following applicability conditions is needed in all tests that were studied on this course, so far?

• Random samples

• Normality of distributions

• At least interval scale

If p-value=0.07 then we reject H0 for 10% of significance, but we don’t reject for 5%.

• True

• False