lecture 3

# lecture 3 - Thursday ANNOUNCEMENTS Section starts meeting...

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Thursday, October 04, 2007 ANNOUNCEMENTS Section starts meeting on Monday Remember to put homework in the front before 12:35 pm or else you will not get credit. Turn in late you might get half credit If you are on the waitlist just hang tight A lot of people drop Some Information about the Homework: http://psy.ucsd.edu/~dbajic/Classes/60Fall7/Anno.html?7.0.48 First, some IMPORTANT clarifications regarding Homework #1 o Assume that the datasets presented in Homework #1 represent samples rather than populations . (However, if you've already completed your homework, and you treated the datasets as populations, we'll accept that, as long as you otherwise did your work correctly.) o Use the computation formulas rather than the definition formulas . (However, if you've already completed your homework, and you used the definition formulas, we'll accept it this time—but we won't accept it in the future, so make sure you don't get in the habit.) o As mentioned in class, when you show your work for computation problems, be sure to include the symbolic versions of the formulas that you used to derive your answers. As mentioned elsewhere, homework must be turned in before the start of lecture on the due date. Hand it in at the front of the class. However, if you arrive in class shortly after the start of lecture, and then hand your homework in to one of the TAs positioned at the back of the classroom. Do this as soon as you arrive. In

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this case, the exact time at which you hand it in will determine whether you get half-credit or no credit. TAs aren't allowed to discuss specific problems from a homework assignment until after that assignment has been turned in. After it has been turned in, however, it will be discussed in detail at the following section meeting. LECTURE 3: VARIABILITY Chapter 4 : averages Measure of central tendency 1. Three kinds of averages a. Mode i. The most frequently occurring values in a set of data ii. Example: the frequency peaks in the distributions iii. Can be more than one mode
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## This note was uploaded on 09/12/2008 for the course PSYC 50 taught by Professor Timothyrickard during the Fall '07 term at UCSD.

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lecture 3 - Thursday ANNOUNCEMENTS Section starts meeting...

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