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Delayed checkpoint: check retention

Delayed checkpoint: check retention: original cases with explanations after your first response.

Paper packet. Every task here also exists on screen, where it is checked automatically; answers written on paper are not assessed by Nydus. When you are back at a device, enter your answers there.

1. What you will learn

After a study gap, attempt the distribution, display and descriptive-statistic cases without referring to the earlier examples. Check probability weights and distinguish observed data from a model's expected result.

2. Practice

X takes values -2 and 4 with equal probability. What is E(3X+1)?

Answer:

3. Practice

A table lists 18 full-time and 12 part-time staff in division A, and 24 full-time and 6 part-time staff in B. What percent of all staff are part-time?

Answer:

4. Practice

The average of five values is 12. Their median is 10. If 7 is added to every value, what is the new median?

Answer:

5. What you can do now

Use this data analysis retention sample to choose the next worked lesson; repeated exposure is review and does not predict an official score.