PSYC 3510: TEST 6
40 Cards in this Set
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Based on the following example, choose the appropriate type of correlation to run:
For first-time financial investors, if their first investment made a gain or a loss and if they choose to invest again in the future.
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phi
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Based on the following example, choose the appropriate type of correlation to run:
Faculty teaching was rated by students and other faculty members on a likert scale. A correlation should be run to see if faculty and students agree.
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spearman rank-order
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Based on the following example, choose the appropriate type of correlation to run:
The correlation between GPA and letter grade on last test.
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spearman rank-order
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Based on the following example, choose the appropriate type of correlation to run:
The relationship between family size and family income
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pearson
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Based on the following example, choose the appropriate type of correlation to run:
whether or not a person graduates from college and their future income.
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point biserial
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Based on the following example, choose the appropriate type of correlation to run:
The Sanchez household is about to install solar panels to reduce the cost of heating their house. In order to know if the solar panels help, they have gathered data from other household on if they have s…
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Phi
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Often the percent of an animal species int he wild that survive to breed again is lower following a successful breeding season. This is part of nature's self-regulation to keep the population stable. A study of merlins (small falcons) in northern Sweden observed if a season was successful…
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point biserial
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Based on the following example, choose the appropriate type of correlation to run:
The relationship between gender and number of shoes a person owns
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point biserial
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Based on the following example, choose the appropriate type of correlation to run:
A husband and wife are shopping for a new house. They have seen 10 different places and each put them in order from best to worst. Which correlation should be run to determine if they have similar taste …
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spearman rank-order
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Suppose you are interested in testing two opposing theories of pet ownership: one saying that people are either dog or cat lovers (negative correlation between # of dogs and cats owned), and the other saying that people are either animal lovers or not (positive correlation). Having survey…
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Pearson
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A defining characteristic of the correlational study is
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the intent is to demonstrate the relationship between variables.
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A researcher watches children on a playground to obtain measurements of their level of activity. Then the researcher watches the children's caregivers on the playground to obtain measurements of their level of verbal reprimanding of children. The researcher hopes to demonstrate that the c…
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correlational research strategy.
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A negative value for a correlation indicates ____.
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increases in X tend to be accompanied by decreases in Y
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The Spearman correlation measures
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the degree of monotonic relationship.
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A Pearson correlation of r = -0.85 indicates that a graph of the data would show
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points clustered close to a line that slopes down to the right.
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A Pearson correlation of r = +0.2 indicates that a graph of the data would show
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points widely scattered around a line that slopes up to the right.
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Similarly to correlational research, the differential design
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demonstrates the existence of a relationship between two variables.
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Dr. Jones hopes to demonstrate that children who eat more sugar also tend to be more active than their peers. If this result is obtained, then ____ would be the predictor variable and ____ would be the criterion variable for the study.
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the amount of sugar; the level of activity
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Which research design is commonly used to help establish the reliability or validity of a measurement procedure?
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the correlational design
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The correlational research strategy is often used when
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the other three choices are all uses of the correlational strategy
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What type of question produces a numerical score for each participant?
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rating scale
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One problem with mail surveys is non-response bias. This means
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individuals who return surveys may not be representative of the general population.
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One concern with telephone surveys is interviewer bias.
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True
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One advantage of rating scale questions is that they produce a numerical score for each participant.
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True
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One disadvantage of open-ended questions is that the responses can be very difficulty to summarize and analyze.
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True
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One problem with surveys administered by mail is nonresponse bias.
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True
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Nonresponse bias refers to the fact that the people who return surveys are often a biased sample that is not representative of the general population.
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True
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One advantage of administering a survey by mail is that it minimizes the risk of interviewer bias.
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True
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The response rate to a mail survey can be increased by
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the other three choices are all methods to increase response rate.
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Which of the following methods for administering a survey does not include the risk of interviewer bias?
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Mail
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A negative value for a correlation indicates ____.
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decreases in X tend to be accompanied by increases in Y
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Which of the following pairs of variables should produce a negative relationship?
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number of hours studying and number of errors on a math exam
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A set of n = 5 pairs of X and Y values has åX = 10, åY = 20, and åXY = 60. For this set of scores, the value of SP is ____.
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20
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A set of n = 5 pairs of X and Y values has SSX = 5, SSY = 20 and SP = 8. For these data, the Pearson correlation is ____.
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r = 8/10 = 0.80
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For a hypothesis test for the Pearson correlation, the null hypothesis states that ____.
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the population correlation is zero
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If the following scores are converted to ranks, what values should be assigned to the two individuals who started with scores of X = 5?
Scores: 2, 3, 5, 5, 7, 10, 18
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Both should receive a rank of 3.5.
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The effect size for the data from an independent-measures t test can be measured by r2, which is the percentage of variance accounted for. The value for r2 can also be obtained by ____.
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squaring the point-biserial correlation for the same data
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A researcher classifies college students as either high or low IQ, then measures each student's grade point average. For the resulting data, which correlation should be used to measure the relationship between IQ and grade point average?
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point-biserial correlation
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A set of X and Y scores has MX = 4, SSX = 15, MY = 5, and SP = 30. What is the regression equation for predicting Y from X?
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= 2X - 3
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A set of n = 10 pairs of scores produces a Pearson correlation of r = 0.50 with SSY = 40. For these scores, SSregression and SSresidual would be ____.
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10 and 30, respectively
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PSYC 3510: FINAL