Use the Fisher LSD test to compare active smokers with nonsmokers and to compare the two groups of smokers on the data in Exercise 16.25 What do these data suggest about the advisability of smoking while you are studying for an exam and the advisability of smoking just before you take an exam?

Exercise 16.25

In the study referred to in Exercise 16.24, Spilich et al. (1992) also investigated performance on a cognitive task that required the participant to read a passage and then to recall it later.

This task has much greater information processing demands than the pattern recognition task.

The independent variable was the three smoking groups referred to in Exercise 16.24. The dependent variable was the number of propositions recalled from the passage. The data follow.

Run the analysis of variance on these data and draw the appropriate conclusions.

Exercise 16.24

What effect does smoking have on performance? Spilich, June, and Renner (1992) asked nonsmokers

(NS), smokers who had delayed smoking for three hours (DS), and smokers who were actively smoking (AS) to perform a pattern recognition task in which they had to locate a target on a screen. The dependent variable was latency (in seconds). The data are presented below. Use any statistical program to plot the resulting means and run the analysis of variance. On the basis of these data is there support for the hypothesis that smoking has an effect on performance?

Transcribed Image Text:

Nonsmokers Delayed Smokers Active Smokers 27 48 34 34 29 65 19 34 55 20 6 33