Subjects
PRICING
COURSES
SIGN IN
Start Free Trial
Rebecca R.
Current Epidemiology Analyst with a Masters in Public Health and an undergrad degree in Kinesiology
Tutor Satisfaction Guarantee
SAS
TutorMe
Question:

I have a file that contains numeric values for dates (04131999). How do I change the numeric variables to date values (4/13/1999)?

Rebecca R.
Answer:

There are a few ways to do this, but I would recommend using an informat statement with mmddyy for example: DATA SET2; SET SET1; DATE2 = INPUT(PUT(DATE1,8.),MMDDYY8.); FORMAT DATE2 MMDDYY8.; RUN;

Public Health
TutorMe
Question:

Define active surveillance and provide an example.

Rebecca R.
Answer:

Active surveillance-occurs when a health department is proactive and contacts health care providers or laboratories requesting information about diseases. While this method is more costly and labor intensive, it tends to provide a more complete estimate of disease frequency. For vaccine-preventable diseases, passive surveillance is the most common method, although active surveillance may be needed in special surveillance situations. Active surveillance is often short-term and usually requires more funding than passive surveillance. (ex: measles outbreak)

Geometry
TutorMe
Question:

If a circle has the diameter of 8, what is the circumference?

Rebecca R.
Answer:

The circumference of the circle is equal to pi multiplied by the diameter (C=pi * d). Substituting 8 for the diameter gives C=8π, where C is approximately 25.13.

Send a message explaining your
needs and Rebecca will reply soon.
Contact Rebecca
Ready now? Request a lesson.
Start Session
FAQs
What is a lesson?
A lesson is virtual lesson space on our platform where you and a tutor can communicate. You'll have the option to communicate using video/audio as well as text chat. You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.
How do I begin a lesson?
If the tutor is currently online, you can click the "Start Session" button above. If they are offline, you can always send them a message to schedule a lesson.
Who are TutorMe tutors?
Many of our tutors are current college students or recent graduates of top-tier universities like MIT, Harvard and USC. TutorMe has thousands of top-quality tutors available to work with you.