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Progress Check

Use this activity to assess whether you and your peers can:

  • Explain the meaning of each relevant item from the StatCrunch output when testing a claim about a mean.

Directions

Use the drop-down menu to learn about the three steps needed to complete this assignment.

Three steps to complete the assignment

Prompt

  1. In a previous lab we tested the following hypotheses, : and : (where is the mean number of alcoholic drinks consumed by students at a liberal arts college).

    In a random sample of 75 students, the mean was 3.93 alcoholic drinks consumed in a week. Here is the StatCrunch output from the hypothesis test.
    : Mean of variable
    :
    :

    Hypothesis test results
    Variable Sample Mean Std. Err. DF T-Stat P-value
    number of drinks per week 3.9333333 0.43592434 74 -1.8275343 0.0717

    Using this context and the StatCrunch output, explain the meaning of each of the following.

    1. Std. Err (standard error)
    2. T-stat (T-score)
    3. P-value
  2. In a previous matched pairs lab we tested the following hypotheses, where is the mean of the differences in corn yield for a plot of land (regular seed minus kiln-dried ): H0 : = 0 and Ha : < 0. In a random sample of 11 seeds of each type, the mean of the differences in the sample was -33.7. Here is a StatCrunch print-out of the hypothesis test.

    Paired T hypothesis test:
     : Mean of the difference between Regular seed and Kiln-dried seed
    :
    :

    Hypothesis test results
    Difference Mean Std. Err. DF T-Stat P-value
    Regular seed – Kiln-dried seed -33.727273 19.951346 10 -1.6904761 0.0609

    Differences stored in column, Differences.

    Using this context and the StatCrunch output, explain the meaning of each of the following.

    1. Std. Err (standard error)
    2. T-stat (T-score)
    3. P-value.

Module 22 Discussion Board

Use the Module 22 (opens in a new tab) to ask questions or provide feedback about the problems in any Module 22 activity – including this peer-reviewed assignment.

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Content by Cuyamaca College math faculty and licensed under the .

Rubric

Formative Assessments

Formative Assessments
Criteria Ratings Pts

This criterion is linked to a Learning OutcomeAnswering the Prompt

10 ptsFull CreditThe first submission demonstrates a good-faith effort to address each part of the Prompt. Either in the first draft or the optional final draft, all parts of the “Prompt” are addressed and the responses demonstrate attainment of the learning objectives in the “Progress Check” section of the assignment. The answers are correct. The writing/work is clear. The explanation/work is reasonable, well-organized, and easy to follow.8.5 ptsMostly CorrectThe first submission demonstrates a good-faith effort to address most of the Prompt. In the optional final draft all parts of the “Prompt” are addressed, and the responses demonstrate attainment of the learning objectives in the “Progress Check” section of the assignment. The answers are mostly correct. The writing/work is clear. The explanation/work is reasonable, well-organized, and easy to follow.

6 ptsOne or more incorrectThe first submission demonstrates a good-faith effort to respond to a smaller portion of the Prompt. In the first draft or the optional final draft, one or more parts of the “Prompt” are not addressed or are incorrect. Or, answers do not demonstrate attainment of the learning objectives in the “Progress Check” section of the assignment. Or, answers are correct, but the writing/work is unclear, incorrect, or difficult to follow.0 ptsNo MarksThe first submission does not demonstrate a good-faith effort to address the Prompt.

10 pts

Total Points: 10

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