Exam 16: Statistical Reasoning in Everyday Life

Which of the following is the measure of central tendency that would be most affected by a few extreme scores?

Statistical significance refers to whether research

The mode of a distribution of scores is the

The range is

After sports magazines give cover-story attention to the outstanding performance of an athlete, the individual often suffers a real decline in performance. This may be at least partially explained in terms of

To compare verbal intelligence at different age levels, researchers tested and retested a group of children from the time they were 2 until they reached the age of 20. The researcher were clearly using a

If IQ scores are normally distributed, having a mean of 100 and a standard deviation of 15, approximately what percentage of people have IQ scores between 55 and 145?

The maximum height of a normal curve corresponds to the ________ of a normal distribution.

If a positive correlation between two sets of scores is displayed as a scatterplot, the points are clustered in a pattern that

The difference between the highest and lowest scores in a distribution is the

Which measure of variation is affected most by a few extreme scores?

On a 10-item test, three students in Professor Hsin's advanced chemistry seminar received scores of 2, 5, and 8, respectively. For this distribution of test scores, the standard deviation is equal to the square root of

The most familiar measure of central tendency is the

When Mr. Adams calculated his students' algebra test scores, he noticed that two students had extremely low scores. Which measure of central tendency is affected most by the scores of these two students?

What is the mean of the following distribution of scores: 2, 3, 7, 6, 1, 4, 9, 5, 8, 2?

During the past year, Zara and Ivan each read 2 books, but George read 9, Ali read 12, and Marsha read 25. The median number of books read by these individuals was

Which of the following statistical measures is most helpful for indicating the extent to which people's happiness predicts the number of friends they have?

The precision with which a sample average approximates a population average increases as

As the size of a sample ________, the size of the standard deviation is most likely to ________.

In a normal distribution, what percentage of scores fall between -1 and +1 standard deviation units of the mean?