Exam 2: Frequency and Probability Distributions

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There are numerous hard-and-fast rules for presenting frequency information.

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All distributions in the family of _____ distributions are symmetrical and characterized by a "bell shape."

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A Bar graph is different then a frequency histogram since the ____________________.

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What is a cumulative frequency?

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Graphs can sometime be constructed to mislead the public.

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The concepts of cumulative frequencies,cumulative relative frequencies,and cumulative percentages are not applicable to frequency distributions for qualitative variables.

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Statisticians conceptualize a probability distribution of a _____ in terms of a probability density function.

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Because frequency graphs can be misleading depending on how the abscissa and ordinate are formatted,behavioral scientists have adopted a _____.

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Dr.Jones using the data above reported that 1 person out of his 100 subjects scored a perfect score of 25.This may be a _____.

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Frequency distributions are used to _____

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In a frequency histogram,the ordinate represents the frequency with which each score occurred.

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For any given score,the cumulative frequency is the frequency associated with that score plus the sum of all frequencies below that score.

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In a frequency polygon,the vertical bar denotes the _____,and the horizontal bar denotes the _____.

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Cumulative relative frequencies are not appropriate for ____ variables.

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In constructing a frequency table,it would be neither practical nor informative to list 100 different values,each with a frequency of 1.

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The axis labeled "b" is called the______. The axis labeled b is called the______.

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A frequency distribution cannot be created for qualitative data,because these variables are not measured on any mathematical scale.

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When we are concerned with a continuous variable,such as the degree of hyperactivity,frequencies and relative frequencies should be thought of in terms of the _____ of the scores.

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A table that lists scores on a variable and shows the number of occurrences of each score is called a _____ distribution.

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If the lowest score in a distribution is 47 and the highest score is 99 and you used six groups,what is the appropriate interval size?

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