Week 2 Practice Worksheet

Prepare a written response to the following questions.

Chapter 3

1. For the following scores, find the mean, median, and the mode. Which would be the most appropriate measure for this data set? The mean would be the sum of all numbers which is

2+2+0+ 5+1+ 4+1+ 3+ 0+ 0+ 1+ 4+ 4+ 0+1+ 4+ 3+ 4+ 2+ 1=124. X(sum)/N=124/20. N=6.2.

The median would be the middle score, the sum of all numbers added together (124) and divided by (20)=6.2. This would be the middle score. The mode is the value in a data set that occurs most often or most frequently. 0,0,0,0,1,1,1,1,1,2,2,2,3,3,4,4,4,4,5. We learn in our chapter reading that The mode would be 1. It occurs most frequently. In sum,

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The table below shows the mean and standard deviation across the participants of these four categories of results. Thus, for example, 782 milliseconds (thousandths of a second) is the average time it took participants in the autonomy-deprived condition to respond to the autonomy-related words, and 211 is the standard deviation across the 26 participants’ average response time in that condition. Explain the numbers in this table to a person who has never had a course in statistics. (Be sure to explain some specific numbers, as well as the general principle of the mean and standard deviation.) For your interest, the pattern of results shown here supported the researchers’ hypothesis: “Relative to a neutral instructional climate, a controlling climate thwarting the need for autonomy…enhanced accessibility for autonomy-related words.” (p.924).

|Mean Latencies (in Milliseconds) in the Lexical Task Assessing Accessibility for Autonomy-Related Constructs |

|(Experiment 1) |

| |Condition |

| |Autonomy Deprivation | |Neutral |