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Null Hypothesis
Statement that says there is no relationship between the two measured items
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Research Methods in Psychology - 4th American Edition @ KPU
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Null Hypothesis
Alternative Hypothesis
Assumptions
Formula for the One-Sample t-Test
Dependent-Samples t-Test
Null and Alternative Hypotheses for the One-Sample t-Test
Degrees of Freedom (One-Sample t-Test)
Example of a One-Sample t-Test
What is the primary purpose of a one-sample t-test?
Match each component of the one-sample t-test to its correct description.
A cognitive psychologist is investigating whether the average reaction time of 50 video game players differs from the general population mean of 300 milliseconds. Arrange the following steps of a one-sample t-test in the correct logical order for this study.
A clinical psychologist is conducting a one-sample t-test to compare the average anxiety scores of patients in a new treatment program to a known population mean. If the psychologist observes that the standard deviation within the sample is larger than expected, while the difference between the sample mean and the population mean remains the same, the resulting t-statistic will be closer to zero.
A researcher conducts a one-sample -test to compare the mean stress scores of a sample of emergency room nurses () to the known general population average (). Despite obtaining a statistically significant result () due to a large sample size, the researcher evaluates the finding as having low practical importance because the calculated _____ was only , indicating a negligible magnitude of difference.
Based on the definition of a one-sample -test, which statistical values are compared in this procedure?
In a one-sample -test, the alternative hypothesis is formulated as , which states that the true population mean differs from the hypothesized value.
A health psychologist is investigating university students' accuracy in estimating the calories in a chocolate chip cookie (which actually has 250 calories). Match each element of this study to its corresponding role in a one-sample -test.
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Statistical Power
Arbitrariness of the p-value Threshold
Bayesian Statistics
Type I Error
Type II Error
In the context of psychological research, which statement best defines a null hypothesis?
If a researcher predicts that caffeine consumption increases alertness, the null hypothesis for this study would state that there is no relationship between caffeine consumption and alertness.
A team of researchers is designing several psychological studies. Match each specific research objective to the corresponding Null Hypothesis (H₀) that the researchers must assume before collecting data.
In psychological research, evaluating a new theory requires a disciplined logical process starting from the Null Hypothesis (). Using the logic of the null as the 'default' position (as seen in the provided image), arrange the steps below to reflect the logical sequence of evaluating a scientific claim.
You are designing a psychological study to investigate the relationship between 'Sleep Quality' and 'Academic Performance' in college students. To establish the necessary logical starting point for your statistical analysis (as illustrated in the provided diagram), which of the following null hypotheses () would you create for your study?
A researcher is investigating whether 'Classical Music' affects 'Concentration Scores' by comparing a group that listens to music with a group that sits in silence. According to the analytical logic of the null hypothesis (H₀), if the researcher assumes there is no relationship between music and concentration, then the numerical value of the difference between the population mean of the music group and the population mean of the silent group is assumed to be _____.
In psychological research, the _____ hypothesis is a formal statement asserting that no relationship exists between the two measured items.
A clinical psychologist is evaluating a new therapy for depression by measuring therapy attendance (number of sessions) and depression severity scores. The null hypothesis for this study would state that there is no relationship between therapy attendance and depression severity.
Match each statistical concept related to hypothesis testing with its correct definition or description based on the logic of the null hypothesis.
Order the logical steps a researcher takes when evaluating a study's results using null hypothesis testing, from the initial assumption to the final decision.