A researcher uses an anonymous survey to investigate the study habits of American college students. Based on the set of 56 surveys that were completed and returned, the researcher finds that these students spend an average of 4.1 hours each week working on course material outside of class. For this study, the set of 56 students who returned surveys is an example of a _________________.
What is a sample?
100
The number of scores in the data set is found by summing this column of a frequency table.
What is the f column?
100
The mean for the following scores: {1, 6, 14}
What is seven?
100
The average deviation of all scores from the mean.
What is the standard deviation?
100
The type of score which describes how many standard deviations away from the mean a particular score is.
What is a z-score?
200
The value of (ΣX)^2 or the following scores: {3, 0, 5, 2}
What is 100?
200
In a frequency distribution graph, frequencies are presented on the ___-axis and the scores (categories) are listed on the ___-axis.
What is y, then x?
200
The measure of central tendency a researcher would use if she was investigating eye color for a sample of n = 50 people.
What is the mode?
200
The z-score which is used for the mean.
What is zero?
200
p(king OR spades)
What is 16/52 = 4/13?
300
Using letter grades (A, B, C, D, and E) to classify student performance on an exam is an example of measurement on a(n) _______ scale of measurement.
What is an ordinal scale?
300
The term used to describe the shape of a distribution in which the scores pile up on the left-hand side of the graph and taper off to the right.
What is a positive skew?
300
The distribution of scores in which the median would be less than the mean, but greater than the mode.
What is a positive skew?
300
Fernando consistently receives good grades in classes, while Esther receives high grades in some courses and low grades in others. _______________’s grades have a smaller standard deviation.
Who is Fernando?
300
The column in the Unit Normal Table which would help you find the proportion of scores in the lowest 10% of the graph.
What is "Column C" OR the "Column toward the tail"
400
A recent study reports that elementary school students who were given a nutritious breakfast each morning had higher test scores than students who did not receive the breakfast. For this study, the independent variable is_______________.
What is whether or not they received breakfast?
400
The classrooms in the Psychology department are numbered from 100 to 120. A professor records the number of classes held in each room during the fall semester. If these values are presented in a frequency distribution graph, what kind of graph would be appropriate?
What is a histogram? OR What is a polygon?
400
Is possible for more than half of the scores in a distribution to have values greater than the mean?
What is yes?
400
A population of scores has μ = 50 and σ = 10. When 5 points are added to every score in the population, then the new mean and standard deviation would be ______.
What is μ = 55 & σ = 10
400
A jar contains 7 red Twizzlers and 29 black Twizzlers. Sandra draws one black Twizzler from the jar and eats it. When she reaches in to grab another, the probability of her randomly selecting a black Twizzler this time:
What is 28/35 = 4/5 = .80 = 80%
500
The additional information obtained when you measure a variable on an interval scale compared to a ordinal scale.
What is the SIZE of the difference?
500
The shape of the distribution when the variability of scores (or standard deviation) is very high.
What is platokurtic?
500
For a perfectly symmetrical distribution with µ = 30, this is the mode.
What is 30?
500
For a population with µ = 40 and σ = 8, the z score corresponding to X = 46.
What is z = 0.75?
500
Last week, Luigi had exams in Math and in Art History. On the Math exam, the mean was µ = 30 with σ = 5, and Luigi had a score of X = 45. On the Art History exam, the mean was µ = 60 with σ = 8 and Luigi had a score of X = 68. The class which Luigi did better in.