Chapter07.pptx

Chapter07.pptx - Hypothesis Testing with z Tests Chapter 7...

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Hypothesis Testing  with  z  Tests Chapter 7

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The  Table > Benefits of standardization: allowing fair  comparisons > z  table: provides percentage of scores  between the mean and a given  z  score
Raw Scores, z Scores, and  Percentages > Step 1: Convert raw score to z score > Step 2: Look up area in Table The table presents area between the Mean  and  z  and beyond the mean and  z.

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From Percentages to  Scores > Step 1: Use the  z table in reverse,  taking a percentage and converting it  into a z score. > Step 2: Convert the z score to a raw  score using the formula.
Sketching the Normal Curve > The benefits of sketching the normal  curve: Stays clear in memory; minimizes errors Practical reference Condenses the information

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The Standardized  z  Distribution

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Calculating the Percentile for a  Positive  z  Score
Calculating the Percentage Above  a Positive  z  Score

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Calculating the Percentage at  Least as Extreme as Our  z   Score
Calculating the Percentile for a  Negative  z  Score

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Calculating the Percentage  Above a Negative  z  Score
Calculating the Percentage at  Least as Extreme as Our  z  Score

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Calculating a Score from a  Percentile
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