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PYC3714-26-EX06
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A psychology lecturer wants to investigate whether students majoring in statistics perform better in quantitative reasoning than the general student population at a university. The average quantitative reasoning score for all university students is 70, while the average score for statistics majors is 75. Although the mean score of statistics students is higher than that of the overall student population, the lecturer cannot conclude that statistics students truly perform better. Why is it not appropriate to make this conclusion based solely on these results?
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Which of the following symbols is used to indicate the probability of making a Type I error?
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Which of the following BEST distinguishes parametric from non-parametric statistical methods?
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We can never know for sure whether a Type I error has been made. Why is this the case?
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Which statement BEST distinguishes a construct from a variable in psychological research?
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What does it mean when two events are mutually exclusive in probability?
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In probability, what does independent mean?
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Using this contingency table, what is the population number of the students surveyed?
Study Method
|
Male
|
Female
|
Row total
|
Individual
|
18
|
12
|
30
|
Group
|
12
|
18
|
30
|
Column total
|
30
|
30
|
60
|
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A researcher wants to investigate whether there is a relationship between levels of depression and academic performance among university students. She measures: Depression levels using the Beck Depression Inventory (BDI) (higher scores = higher levels of depression), and Academic performance using final course marks (out of 100). Data was collected from 10 undergraduate students. The significance test for the correlation produces a p-value of p = 0.001, using α= 0.05. What conclusion should the researcher draw?
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A researcher wants to investigate whether there is a relationship between levels of depression and academic performance among university students. She measures: Depression levels using the Beck Depression Inventory (BDI) (higher scores = higher levels of depression), and Academic performance using final course marks (out of 100). Data was collected from 10 undergraduate students. What type of graph will be used to demonstrate the relationship between depression and academic performance?
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