Ed 602 Assignment 11

Enter your name and student ID# in the spaces below. Then provide an answer to each of the questions entered on this form. You may make the following substitutions in your answers if necessary.

Use not equal for the not equal to symbol, .

Use mu1 for the group 1 mean symbol, .

Use mu2 for the group 2 mean symbol, .

Use H0 for the null hypothesis symbol, H0.

Use H1 for the alternative hypothesis symbol, H1.

Use <= for the less than or equal to symbol, .

Use >= for the greater than or equal to symbol, .

After you have filled in all of your answers click on the Submit button at the bottom of the page. You will recieve confirmation that your assignment has been received. A copy will be sent to your instructor who will go over your answers and give you feedback through electronic mail.

Name:

Student ID# (or SSN):

For each of the following research problems, complete the process for testing statistical hypotheses for a research problem by filling in the spaces provided for answers. Where calculations are required just provide the answer, you do not have to show your work.

  1. Two fourth-grade teachers in Lincoln School want to know if the gender of the main character in a story makes a difference in their male students' interest in the story. Each class had 14 boys in the class. One group of boys read a story that had a female as the main character, while the other group of boys read a story that had a male as the main character. After reading the stories each boy completed an interest inventory to indicate how interested he was in the story. Was there a significant difference in the interest inventory scores for the two groups?

    Interest Inventory Scores for Two Groups of Boys
    Female as main character Male as main character
    14 19
    13 17
    17 18
    10 20
    18 18
    16 17
    15 16
    15 18
    15 20
    16 19
    14 18
    17 17
    16 16
    15 17

    1. H0:

      H1:

    2. alpha =

    3. t =

      df =

    4. State the rule for rejecting the null hypothesis:

    5. Decision:

    6. Statement of results:

  2. A sociologist wants to determine whether there is a significant difference between the number of hours worked per week by a random sample of blue-collar workers and those worked by a random sample of white-collar managers. The sociologist randomly samples nine blue-collar workers and eight white-collar managers and asks each to indicate the average number of hours worked per week over the last 6 months. Analyze the following data from this study.

    Number of Hours Worked per Week for Two Groups of Workers
    Blue-Collar Workers White-Collar Managers
    43.6 40.2
    51.0 45.1
    39.1 35.8
    46.3 43.0
    42.7 50.1
    40.2 41.3
    36.0 46.7
    45.0 39.4
    44.8

    1. H0:

      H1:

    2. alpha =

    3. t =

      df =

    4. State the rule for rejecting the null hypothesis:

    5. Decision:

    6. Statement of results:

After answering all questions, press .

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John Wasson
Last modified: Tue Aug 16, 2005