Question

A cognitive psychologist has devised a new paradigm to assess empathy in humans by exposing them to images of other humans in pain and seeing whether this evokes an emotional response in the participants. Among the various aspects of an emotional response is a physiological response, such as variations in normal resting heartrate. It would lend validity to the psychologists paradigm if exposure to these painful images causes changes in an individuals normal heartrate. As such, the psychologist selects a random sample of n = 10 male undergraduate Psychology students from an overall pool of eligible students. Each participant is exposed to a painful image for 5 seconds and their Heartrate in beats per minute (BPM) is recorded immediately after. The psychologist reports that the average Heartrate (BPM) of the sample was M = 90 beats per minute. Suppose is known that the normal resting heartrate of this population is = 70 beats per minute. The distribution of beats per minute is normal with a standard deviation of a 20. Lising the scenario, please answer the following questions below Please type a number rounded to the nearest TENTHS place (6.8.2.9) as your answer for the blank below. The value of the sample size (n) for this study is The value of the sample mean M for this study is The value of the population meant for this study is The value for the mean difference (M) for this study is The value of the population standard deviation for this study is Please type a number rounded to the nearest HUNDREDTHS place (n.2.2.97) as your answer for the blank below. The value of the standard error of the means fol for this study is Please include the sign before each value as your answer for the blonk below (..+ or -2.97. not both!. The t-statistic for this study (and overall hypothesis test) is

Answer 1

Here we have to test Hoi u=70 Hi el #70 n = 10 190 u = 701 M-4 =120 Fl2o1 6 20 B in BM = 20 Vio by - (6.325 M-u 11 t.. = M 2o 6.325 3.162 M. 2.262 Question let a=o os degrees of freedom = n=10 tag critical value= talant int - to.025;g Decision Rule: Reject Ho if Itml> ty, n-/ 30 Itml> talant i e 3.162 > 2.262 Wer reject Ho at 5 % s t significance level, and conclude that significant effect is present here. so given statement is | True) Question 8 Cohen d effect size d M-u 7 20 20 1 The calculated measure of deplject size is