**Practice Problems: Standard Scores**

For the numbers below find the area between the mean and the z.
a. z = 1.17 | b. z = -.85 |

c. z = 2.07 | d. z = -1.37 |

Answer

For the numbers below find the percentile rank (the % of individuals scoring below).
a. z = 2.24 | b. z = -1.65 |

c. z = 1.47 | d. z = -.47 |

Answer

For the numbers below find the percent of cases falling above the z.
a. z = .24 | b. z = -1.11 |

c. z = 1.22 | d. z = -2.07 |

Answer

For the numbers below find percent of cases falling between the two z-scores.
a. z = -.38 & z = 1.63 | b. z = .88 & z = 1.55 |

c. z = -1.93 & z = 1.09 | d. z = -2.22 & z = - 1.34 |

Answer

A patient recently diagnosed with Alzheimer's disease takes a cognitve abilities test. The patient scores a 45 on the test (mean = 52, standard deviation of 5. What is this patient's percentile rank?

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Another patient with Parkinson's disease takes the same cognitive abilities test as in the question above and scores an 54. What percent of individuals would receive higher score?

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A fifth grader takes a standardized achievement test (mean = 125, S = 15) and scores a 148. What is this child's percentile rank?

Answer

8. Pat and Chris both took a spatial abilities test (mean = 80, S = 8). Pat scored a 76 and
Chris scored a 94. What percent a individuals would score between Pat and Chris?

Answer

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