Exam 5: Data Organization and Descriptive Statistics

Faculty in the psychology department at State University consume an average of 5 cups of coffee per day with a standard deviation of 1.5.The distribution is normal.What is the percentile rank for an individual who consumed 8 cups of coffee per day?

If Joe scored 25 on a test with a mean of 20 and a standard deviation of 5 what is his z-score?

A z-score is most affected by the

Imagine that 86,999 people who are penniless live in Centerville.Bill Gates,whose net worth is $87,000,000,000 moves to Centerville.Now the mean net worth in this town is _____ and the median net worth is _____.

A variable for which the scores represent a change in quantity is a _____ variable.

Bar graphs are to _____ as frequency polygons are to _____.

Draw the frequency polygon for the following distribution (there are 30 scores in the distribution).In addition,calculate the mean,median,and mode for the distribution. 48,50,53,59,59,63,63,67,67,67,72,72,72,78,78,78,78,85,85,85,85,85,90,90,90,90,95,95,98,100

A graphical representation of a frequency distribution in which vertical bars are centered above each category along the x-axis and are separated from each other by a space,is a _____.

A categorical variable for which each value represents a discrete category is a _____ variable.

The calculation of the average deviation differs from the calculation of the standard deviation in that when calculating the average deviation the difference scores are

A number that characterizes the "middleness" of an entire distribution is _____.

Faculty in the psychology department at State University consume an average of 5 cups of coffee per day with a standard deviation of 1.5.The distribution is normal.What proportion of faculty consumes an amount between 4 and 6 cups?

During the past year,Cindy and Bobby each read 2 books,but Greg read 25,Jan read 12,and Marcia read 9.The median number of books read by these individuals was

A graphical representation of a frequency distribution in which vertical bars centered above scores on the x-axis touch each other is a _____.

A distribution can have more than one ____ but can have only one _____.

_____ is to organizing data using a table as _____ is to organizing data using a figure.

Sue took a test in both biology and math last week.The biology test had a mean of 70 and a standard deviation of 7 whereas the math test had a mean of 75 and a standard deviation of 10.Sue scored a 76 on the biology test and a 76 on the math test.On which test did she do better in comparison to the rest of the class?

Mode is to _____ and median is to _____.

Explain the difference between qualitative and quantitative variables noting the relationship of nominal,ordinal,interval,and ratio data to these terms.

Karen's first psychology exam score is ?1 standard deviation from the mean in a normal distribution.The test has a mean of 75 and a standard deviation of 5.Karen's percentile rank would be