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Exam 16: Statistical Reasoning in Everyday Life

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Question 61

Multiple Choice

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Which of the following statistics must fall on or between -1.00 and +1.00?

A) the mean
B) the standard deviation
C) the correlation coefficient
D) none of these statistics

E) A) and C)
F) All of the above

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Question 62

Multiple Choice

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When a difference between two groups is "statistically significant," this means that

A) the difference is statistically real but of little practical significance.
B) the difference is probably the result of sampling variation.
C) the difference is not likely to be due to chance variation.
D) all of these differences exist.

E) None of the above
F) A) and B)

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Question 63

Multiple Choice

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Standard deviation is to mode as ________ is to ________.

If a set of standardized test scores is normally distributed, having a mean of 75 and a standard deviation of 6, approximately 95 percent of the scores are somewhere between

On average, Caryl's school bus arrives on time, although sometimes it is a bit early or late. If the arrival times are distributed on a normal curve, which of the following statistics would enable Caryl to estimate the probability that her bus will arrive within 5 minutes of its scheduled arrival time on any given day?

A homogeneous sample with little variation in scores will have a(n) ________ standard deviation.

The value of the correlation coefficient indicates the ________ of relationship between two variables, and the sign (positive or negative) indicates the ________ of the relationship.

Professor Chang displays the relationship between the height and weight measurements of over 500 randomly selected people using a scatterplot. The points on the scatterplot are most likely clustered in a pattern that

Standard deviation is to mean as ________ is to ________.

If half the students at Quincy College have blue eyes, which of the following events is most probable?

In any distribution of scores, an equal number of scores are both greater than and less than

The first step in constructing a bar graph is to

In a distribution of test scores, which measure of central tendency would likely be the most affected by a couple of extremely high scores?

What is the mean of the following distribution of scores: 2, 5, 8, 10, 11, 4, 6, 9, 1, 4?

Evelyn wants to know how consistent her bowling scores have been during the past season. Which of the following measures would be most relevant to this specific concern?

For which of the following distributions of scores would the median most clearly be a more appropriate measure of central tendency than the mean?

Professor Woo noticed that the distribution of students' scores on her last biology test had an extremely small standard deviation. This indicates that the

The mean of a distribution of scores is the

Seven members of a 4H club reported the following individual earnings from their sale of cakes: $7, $13, $3, $5, $2, $9, and $3. In this distribution of individual earnings, the

Research in which the same group is tested and retested over a period of years is a