Assinment 2 Supplement A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week A student is interested in whether students who study with music playing devote as much attention to their studies as do students who study under quiet conditions (he believes that studying under quiet conditions leads to better attention). He randomly assigns participants to either the music or no-music condition and has them read and study the same passage of information for the same amount of time. Subjects are given the same 10-item test on the material. Their scores appear here. Scores on the test represent interval-ratio data and are normally distributed. Music NO music 6 10 5 9 6 7 5 7 6 6 6 6 7 8 8 6 5 9 QUESTIONS ARE: a. What statistical test should be used to analyze these date? b. Identify H0 and Ha for this study c. Conduct the appropriate analysis d. Should H0 be rejected? What should the researcher conclude? e. If significant, compute and interpret the effect size. f. If significant, draw a graph representing the data. g. Determine the 95% confidence interval 4.) The researcher in the above decides to conduct the same study using a withinparticipants design to control for differences in cognitive ability. He selects a random sample of subject and has them study different material of equal difficulty in both music and no-music conditions. The study is completely counterbalanced to control for order effects. The data appear next. As before, they are measured on an intervalratio scale and are normally distributed; he believes that studying under quiet conditions will lead to better performance. Music No Music 7 7 6 8 5 7 6 7 8 9 8 8 a) What statistical test should be used to analyze these data b) Identify H0 and Ha for this study c) conduct the appropriate analysis d) Should H0 be rejected? What should the researcher conclude? e) If significant, compute and interpret the effect size. 6) Researchers at a food company are interested in how a new spaghetti sauce made from Green tomatoes (and green in color) will compare to their traditional red spaghetti sauce. They are worried that the green color will adversely affect the tastiness scores. They randomly assign subjects to either green or red sauce condition. Participants indicate the tastiness of the sauce on a 10-point scale. Tastiness scores tend to be skewed. The scores follow: RED SAUCE GREEN SAUCE 7 4 5 5 9 6 10 8 6 7 7 6 8 9 a) What statistical test should be used to analyze these data? b) Identify H0 and Ha for this study c) Conduct the appropriate analysis d) Should H0 be rejected? What should the researcher conclude? 8) You notice in your introductory psychology class that more women tend to sit up front, and more men sit in the back. To determine whether this difference is significant, you collect data on the seating preferences for the students in your class. Data follow: Men Women Front of the room 15 27 Back of the room 32 19 a) What is X2obt? d) What is the df for this test? e) What is X2cv? d) What conclusion should be drawn from these results