Which of the following is an advantage that an independent-measures study has ov

Question

Which of the following is an advantage that an independent-measures study has over a repeated-measures study?

For an independent-measures experiment, the F-ratio is 3.1. If dfbetween = 5, and dfwithin = 14, what will the researcher conclude?

What do the chi-square test for independence, the Pearson correlation, and simple linear regressions all have in common?

Which of the following is true?

A researcher obtains an independent-measures t statistic of t = 3.01 for a study comparing two treatments with a sample of n = 16 in each treatment. What is the correct decision for a regular two-tailed hypothesis test?

A researcher introduces a second factor due to individual differences to create a factorial design from an independent-measures design. Why can this help the researcher draw conclusions about the data set?

For a repeated-measures t test, the cutoff value for ? = _____ using a one-tailed test is the same as the cutoff value for ? = _____ using a two-tailed test.

A researcher selects a sample of n = 25 individuals from a population with a mean of ? = 103 and administers a treatment to the sample. If the research predicts that the treatment will decrease scores, then what is the correct statement of the null hypothesis for a directional (one-tailed) test?

Suppose the correlation between age and number of hours of sleep per night for adults is –0.70. What proportion (or percent) of the variability in nightly hours of sleep can be explained by the relationship with age?

Which of the following is a problem with using the z-score statistic?

In a repeated-measures analysis of variance, there are 6 subjects who each underwent 3 treatments. What are dfbetween subjects and dferror?

Which of the following lists the correct order for calculating ?(X–1)2.

Which of the following is true for the quantity ?(X – ?)?

a. An independent-measures design can eliminate time-related factors. b. An independent-measures design can use fewer participants. c. An independent-measures design can be used on populations with large variances. d. There is no advantage to using an independent-measures study.

Explanation / Answer

Which of the following is an advantage that an independent-measures study has over a repeated-measures study?

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The p-value of F test is: 0.0432

Since p-value is less than 0.05 so we reject the null hypothesis.

Since p-value is greater than 0.01 so we fail to reject the null hypothesis.

Correct option: b. The null hypothesis will be rejected with ? = 0.05, but not with ? = 0.01.

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c. They all evaluate the relationship between two variables.

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a. All ratio scales are interval scales.

c. An independent-measures design can be used on populations with large variances.

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