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Research Methods (Statistics And Applications) MCQ

One sample t test is an inferential statistic that compares a sample mean to a known population mean.

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A statistical test used to calculate the effect size for a one-sample t test is ______.

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Assumptions of the one-sample t test include all except ______.

Correct Answer: Ordinal or ratio data

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The 95% confidence interval tells the researcher ______.

Correct Answer: The interval in which you can expect the difference between the sample mean and population mean to fall 95% of the time

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In a study comparing the anxiety scores of college athletes to the average for college students, you find h2 = .20. You interpret this to mean ______.

Correct Answer: Twenty percentage of the variability in the athletes’ anxiety scores are accounted for by their group membership

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A study compares the average salary for a sample of assistant professors at a small private college with the national average for assistant professors and finds t(30) = –5.16, p = .006, d = .32. The probability of a Type I error is ______.

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The one-sample t test is computed by ______.

Correct Answer: Subtracting the population mean from the sample mean and dividing by the estimated standard error of the means

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Suppose you compare the average time spent on household chores and childcare by a sample of single moms with preschoolers to the national average for all women with children. You find t(25) = 2.80, p = .01. What can you conclude?

Correct Answer: There is a significant difference between the amount of time single moms with preschoolers spend on household chores and childcare and the national average for all women with children.

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If a one-sample t test is significant, what information do you need to interpret whether a sample score is significantly higher or lower than an expected score or average?

Correct Answer: The M of the sample and the expected score or value

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If the obtained t value is ______ than the critical t value, you ______ the null hypothesis.

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A study compares the average salary for a sample of assistant professors at a small private college with the national average for assistant professors and finds t(30) = –5.16, p = .006, d = .32. You can interpret this to mean ______.

Correct Answer: There is a small effect size for the college

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Standard error of means is standard deviation of the sampling distribution of means.

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The percentage of variability in a measured variable which is accounted for by the grouping variable. It is used as a measure of effect size in studies analyzed with an ANOVA is called eta squared

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Estimate standard error of the means is estimated standard deviation of the sampling distribution of means that is used to calculate the ___test.

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Determined by the sample size; number of scores free to vary in a sample is called degree of ___

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