What do you call a value that describes a population?

What is the naturally occurring discrepancy, or error, that exists between a sample statistic and the corresponding population parameter?

What term refers to internal attributes or characteristics that cannot be directly observed but are useful for describing and explaining behavior?

What is the branch of science that deals with the collection, organization, analysis, interpretation, and presentation of data?

Which of the following is a discrete variable?

A Likert scale is what kind of scale of measurement?

Which of the following scales of measurement has an absolute zero property?

What research method attempts to establish a cause-and-effect relationship between the independent and dependent variables?

A company surveyed 100 of its customers to see their average satisfaction rating. What does the computed average satisfaction rating represent?

What term refers to how well the measurement rule actually measures the variables under consideration as opposed to some other variable?

What do you call an index of how consistently the rule assigns the same number to the same observation?

The plasma beta-carotene level, in ng/ml, was measured for a sample of n = 315 individuals, and the results are shown in the histogram. What could we describe about the shape of the distribution?

Which of the following histograms has the greatest variability?

In a distribution with negative skew, where are the scores with the highest frequencies located?

A student obtained a score of 77% of an exam’s perfect score. He was told that he surpassed 80% of the class. What does 80% represent?

What is the equivalent percentile for the 3rd Quartile?

*A study observed 119 people playing Rock-Paper-Scissors. Their choices are shown in the table. What is the relative frequency for Paper?

*Given that data 1.3, 12.6, 4.6, 50.7, 6.6, 10.5, and 7.3, what is the 25th Percentile?

*Given the table of X and corresponding f values, what is the cumulative frequency for X = 12?

What is known as a single value we compute from a collection of measurements to describe one of the collection’s particular characteristics?

What are individual values that are substantially different (larger or smaller) from the majority of values?

Given a set of data, if the mean is less than the median, then:

A student wants to compute her final grade in Mathematics that follows a grading system: Quizzes – 30%, Midterm Exam – 30%, and Final Exam – 40%. What type of mean would she use to compute her final grade?

The value of one score in a distribution is changed from X = 20 to X = 30. Which measure(s) of central tendency is(are) certain to be changed?

*Find the mean for the following scores: 8, 7, 5, 7, 0, 10, 2, 4, 11, 7, 8, 7

*Find the median for the following scores: 8, 7, 5, 7, 0, 10, 2, 4, 11, 7, 8, 7

*Find the mode for the following scores: 8, 7, 5, 7, 0, 10, 2, 4, 11, 7, 8, 7

*A sample of scores has a mean of $$M = 6$$ . What is the mean if a constant value of 3 is added to each score?

*A population of scores has a mean of $$\mu = 50$$ . What is the mean if each score is divided by a constant value of 50?

What is the average squared distance from the mean?

What is the distance between the maximum value and the minimum value?

For which of the following distributions would $$X = 35$$ be most extreme?

Which of the following sets of scores has the largest variance?

A psychologist used the median in her dataset. What is the measure of variability that she would use?

*If 5 points are added to every score in a population with a mean of $$\mu = 45$$ and a standard deviation of $$\sigma = 6$$ , what are the new values for $$\mu$$ and $$\sigma$$ ?

*What is the variance for the following sample of $$n = 5$$ scores? Scores: 2, 0, 8, 2, 3

*What is the standard deviation for the following population of scores? Scores: 1, 3, 9, 3

*What is SS, the sum of the squared deviations, for the following population of $$N = 5$$ scores? Scores: 1, 9, 0, 2, 3

*The dataset has the sample mean of $$M = 60$$ and the sample standard deviation of $$s = 12$$ . What is the sample coefficient of variation?

What score measures how many standard deviations an observed value is above or below the mean?

What distribution is composed of scores that have been transformed to create predetermined values for $$\mu$$ and $$\sigma$$ ?

Which of the following is an advantage of transforming $$X$$ values into z-scores?

Under what circumstances would a score that is 20 points above the mean be considered an extreme score?

A score has a z-score of $$z = -1.75$$ . Which of the following describes the percentile rank of the z-score?

*For a population with a standard deviation of $$\sigma = 4$$ , a score of $$X = 24$$ corresponds to $$z = -1.50$$ . What is the population mean?

*For a sample with a mean of $$M = 63$$ , a score of $$X = 54$$ corresponds to $$z = -0.75$$ . What is the sample standard deviation?

*For a population with $$\mu = 50$$ and $$\sigma = 6$$ , what is the z-score for $$X = 47$$ ?

*For a population with $$\mu = 50$$ and $$\sigma = 6$$ , what is the score that corresponds to $$z = 2.50$$ ?

*A cognitive psychology exam has a $$\mu = 80$$ and $$\sigma = 9$$ , and a statistics exam has a $$\mu = 75$$ and $$\sigma = 5$$ . Matt got a score of 85 in cognitive psychology and a score of 80 in the statistics exam. Which exam did Matt perform better on, considering the grades of the other students?

What graph visualizes the relationship between two quantitative variables?

What is a measure of the strength and direction of linear association between two quantitative variables?

Observe the figure below. Which of the following is most likely to be the correlation between these two variables?

Observe the figure below. Which of the following values gives the correlation between these two variables?

Which of the following is a justified conclusion if a correlation is negative?

*A regression line for predicting $$Hgt =$$ height in inches from $$Age =$$ age in years of a child is shown in the image. What is the predicted height for a child who is 12 years old and 60 inches tall?

*A regression line for predicting Hgt = height in inches from Age = age in years of a child is shown in the image. What is the residual of a child who is 12 years old and 60 inches tall?

*A regression line for predicting Grade, grade on the exam, from Study, number of hours spent studying for an exam, is shown in the image. What is the predicted grade for a student who studied 10 hours and received an 81 on the exam?

*A regression line for predicting Grade, grade on the exam, from Study, number of hours spent studying for an exam, is shown in the image. What is the residual for a student who studied 10 hours and received an 81 on the exam?

Which of the following correlations indicates the most consistent relationship between X and Y?