8. Identify the type of missingness (missing completely at random, missing at random or not missing at random) for the following scenarios:
d. For 1 week in July, the clinic is out of tubes so no blood is drawn during this period.
e. Patients who exercise infrequently are often skipping the survey questions about exercise habits.
f. Study participants who work nights are less likely to record their morning blood pressure.
g. Air pollution samples from rural areas are more likely to be missing than samples from urban areas.
h. Obese patients are less likely to have weight measurements due to the limited capacity of some weighing scales.