7. A population has u = 60 and o = 10. Find the z-score corresponding to each of the following sample means: a. A sample of n = 4 with M = 55 b. A sample of n = 25 with M = 55 C. A sample of n = 100...

Rounding policy:

• Proportion: 4 decimal places


• Percentile: round to the closest whole unit number


• All others: 2 decimal places

Extracted text: 7. A population has u = 60 and o = 10. Find the z-score corresponding to each of the following sample means: a. A sample of n = 4 with M = 55 b. A sample of n = 25 with M = 55 C. A sample of n = 100 with M = 55 d. What do we notice about the z-scores as the sample size changes %3D %3D 8. If you are taking a random sample from a normal population with u = 100 and o = 16, which of the following outcomes is more likely? Explain your answer. a. A sample mean greater than 106 for a sample of n = 4. b. A sample mean greater than 103 for a sample of n = 36.


Extracted text: 10. A researcher evaluated the effectiveness of relaxation training in reducing anxiety. One sample of anxiety ridden people received relaxation training, while a second sample did not. Then anxiety scores were measured for all subjects, using a standardized test. Use the information summarized in the following table to complete this item. The Effect of Relaxation Training on Anxiety Scores Group Control group Mean Anxiety Score SE 36 7 Relaxation 18 training What is the independent variable (IV)? b. How many levels do we have for the IV? C. What is the level of measurement for the IV? d. What is the DV (remember, the DV is the data)? а. С. e. What is the level of measurement of the DV? f. What is the best graph to display this data? Explain g. Construct a graph (by hand) that incorporates all the information in this table. h. Looking at your graph, do you think that the relaxation training really worked. Explain your answer.