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Calculate the obtained z-score by hand

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Reference no: EM132230114

Question: Scenario: Lucy wants to know how her fourth-grade daughter, Monica, scored on a test of reading comprehension compared to the population of other fourth graders in the school district. Luckily, Lucy has taken this course and knows that a z-score will help her understand Monica's reading score in relation to the population. You can find the data for this Assignment in the Weekly Data Set forum found on the course navigation menu.

1. State the dependent variable.

2. Explain whether Lucy should use a one-tailed or a two-tailed z-test and explain why.

3. State the null hypothesis in words (not formulas).

4. State the alternative hypothesis in words (not formulas).

5. Calculate the obtained z-score by hand. Describe your calculations (i.e., show your work).

6. When alpha is set at .05, the critical value is ± 1.96. Should the null hypothesis be retained or rejected? Explain why.

7. Are the results statistically significant? How do you know?

8. What should Lucy conclude about Monica's reading comprehension score in comparison to the population?

9. Lucy is excited that she remembers how to compute a z-score and does some additional computations to find Monica's z-score in math. You can find the information you need in the Weekly Data Set forum. Use it to calculate Monica's raw math score by hand. Provide your calculations in your Assignment submission (i.e., explain your work).

Submit responses to the following:

Be sure to fully explain the rationale for your answer to each question, including evidence from the text and Learning Resources.

Provide an APA reference list.

Reference no: EM132230114

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