# Psych 1003 Assignment 4 Fall 2014

A statistics instructor developed a special teaching method to reduce studentsâ boredom in class. (Not that students are ever bored in statistics). It is known from previous research that on a scale of 0 to 100 (0 = not at all bored, 50 = kind of bored, and 100 = Iâm trying to sleep, please stop bothering me), the average level of boredom in statistics is 55 with a standard deviation of 10, and the levels of boredom are normally distributed.Part I: Instead of using the special teaching method on one student (which heâs already done on Assignment #3), the instructor uses the technique on a class of 25 students. Their average level of boredom was 50. He wants to determine if he should reject or retain the null hypothesis using a .05 level of significance.1. Define the 2 populations weâre interested in. (3 pts)Population 1:Population 2:2. What are the research and null hypotheses? (3 pts)H1:H0:3. Draw both comparison distributions. Fill in the variables and then draw both our comparison population and distribution of means. Be sure to label both charts correctly. (3 pts)? =? =?M =?M =4. Determine our cutoff scores and label them back on the distribution of means. (3 pts)5. Determine our sampleâs score and label it correctly on the distribution. (3 pts)6. Do we reject or retain the null hypothesis? Please explain. (3 pts)Part II: Again, he tests his special teaching method but this time he is looking to see if it has any difference on the studentsâ scores. He selects 20 students at random from his classes. Their level of boredom was 68. He wants to determine if he should reject or retain the null hypothesis using a .01 level of significance. Use the steps above to complete this on your own. (15 pts)
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# Psych 1003 Assignment 4 Fall 2014

A statistics instructor developed a special teaching method to reduce studentsâ boredom in class. (Not that students are ever bored in statistics). It is known from previous research that on a scale of 0 to 100 (0 = not at all bored, 50 = kind of bored, and 100 = Iâm trying to sleep, please stop bothering me), the average level of boredom in statistics is 55 with a standard deviation of 10, and the levels of boredom are normally distributed.Part I: Instead of using the special teaching method on one student (which heâs already done on Assignment #3), the instructor uses the technique on a class of 25 students. Their average level of boredom was 50. He wants to determine if he should reject or retain the null hypothesis using a .05 level of significance.1. Define the 2 populations weâre interested in. (3 pts)Population 1:Population 2:2. What are the research and null hypotheses? (3 pts)H1:H0:3. Draw both comparison distributions. Fill in the variables and then draw both our comparison population and distribution of means. Be sure to label both charts correctly. (3 pts)? =? =?M =?M =4. Determine our cutoff scores and label them back on the distribution of means. (3 pts)5. Determine our sampleâs score and label it correctly on the distribution. (3 pts)6. Do we reject or retain the null hypothesis? Please explain. (3 pts)Part II: Again, he tests his special teaching method but this time he is looking to see if it has any difference on the studentsâ scores. He selects 20 students at random from his classes. Their level of boredom was 68. He wants to determine if he should reject or retain the null hypothesis using a .01 level of significance. Use the steps above to complete this on your own. (15 pts)
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