TutorMe homepage

SIGN IN

Start Free Trial

Lulu Y.

Statistical Programmer for a Top 20 Pharmaceutical Company

Tutor Satisfaction Guarantee

SAS

TutorMe

Question:

What is the difference of "PROC SORT NODUP " and "PROC SORT NODUPKEY"?

Lulu Y.

Answer:

NODUP will delete the observations which are exactly the same in all variables. NODUPKEY will delete the observations which are identical in the "BY" variable(s).

Calculus

TutorMe

Question:

When we want to know a maximum value of a curve, y = 5+ x^2 (x square), what is the solution by using derivative?

Lulu Y.

Answer:

Find the derivative of y = 5+ x^2 , which is 2*x, and when this equals to 0, we have the max value of y

Statistics

TutorMe

Question:

When we are using t-test to compare the mean of two groups, for example, we want to find out, whether there is a significant difference in the height of two groups of girls. What assumption we need before we are using t-test?

Lulu Y.

Answer:

The mean of the height of two groups is asymptoticly normally distributed.

Send a message explaining your

needs and Lulu will reply soon.

needs and Lulu will reply soon.

Contact Lulu

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.

Made in California

© 2019 TutorMe.com, Inc.