Exam 5: Data Organization and Descriptive Statistics

The middle score in a distribution after the scores have been arranged from highest to lowest or lowest to highest is the _____.

If the shape of a frequency distribution is lopsided,with a long tail projecting longer to the right than to the left,how would the distribution be skewed?

Draw two distributions with the same standard deviations but different means.

A table in which all of the scores are listed along with the frequency with which each occurs is a _____.

Rich's first psychology exam score is +1 standard deviation from the mean in a normal distribution.The test has a mean of 60 and a standard deviation of 6.Rich's percentile rank would be approximately

Draw a positively skewed distribution and a negatively skewed distribution noting where the mean,median,and mode would fall with respect to each other in these distributions.

In a psychology class of 100 students,test scores are normally distributed with a mean of 80 and a standard deviation of 5.Approximately what percentage of students have scores between 70 and 90?

Imagine that distribution A contains the following scores: 3,4,5,6,7.Imagine that distribution B contains the following scores: 1,3,5,8,10.Distribution A has a _____ standard deviation and a _____ average deviation in comparison to distribution B.

The arithmetic average of a distribution is the:

Which of the following is FALSE?

A table in which the scores are grouped into intervals and listed along with the frequency of scores in each interval is a _____.

Approximately what percentage of scores are between z=1 and z=2?

Explain the difference in proper use between a bar graph and a histogram.

When Ms.Jones calculated her students' accounting test scores,she noticed that one student had an extremely low score.Which measure of central tendency should not be used in this situation?

Calculate s (standard deviation)and A.D. (average deviation)for the following sample. 2,2,6,9,10,10,15,18,18,20.

Which of the following is a disadvantage of using the range as a measure of variation?

For a hypothetical normal distribution of test scores,approximately 95% fall between 38 and 62,2.5% are below 38,and 2.5% are above 62.Given this information,(a)the mode = _________ and (b)the standard deviation = _________.

Qualitative variable is to quantitative variable as ____ is to _____.

Calculate the mean,median,and mode for the following sample: 2,2,6,9,10,11,15,17,18,20.

A line graph of the frequencies of individual scores is a _____.