Exam 4: Percentiles percentile Ranks standard Scores and the Normal Distribution

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An instructor has given his final exam and scores that are normally distributed.Nancy scores a 90 and Ronald scores a 75.The class mean on the exam was 85 and the standard deviation was 36.What is Nancy's T score? (Hint use formula: mean=50 +10 (standard or Zscore)

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John scores an 85 on his psychology exam.The other relevant characteristics of the distribution are as follows: = 75,s2 = 4.What is John's standard score?

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The score value corresponding to a given percentile rank is referred to as a standard score.

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Another name for a standard score in a normal distribution is _____.

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The scores below represent the results of an in-class quiz worth 10 points. How many students scored a 5 or below?

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The proportion of scores occurring between standard scores of 0 and -1 is _____ the proportion of scores occurring between standard scores of 0 and +1.

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What is a T score?

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The percentile rank is ____________________.

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A standard score converts a score from its original,or raw,form to a form that takes into consideration its standing relative to the mean and standard deviation of the entire distribution of scores.

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Which of the following does a percentile rank and a standard score have in common?

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A standard score is the difference between the original score and the standard deviation,divided by the mean.

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A ____________________is based on a normal distribution.

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If Jack's standard score on his math test is .60 and -.75 on his English he did better on his____.

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All normal distributions reflect empirically real phenomena.

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A standard score represents the number of _____ that a score falls above or below the mean.

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All normal distributions are:

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An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85, S2 = 36.Approximately what percentage of scores falls at or between Nancy's and Ronald's scores?

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Percentile ranks must always be interpreted relative to the _____ upon which the scores are based.

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In a normal distribution,approximately _____ of all scores fall between standard scores of -1 and +1.

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Given a normal distribution,what z score would correspond to the 50th percentile?

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