Research Methods II potential MCQ's

1

Steven scores 55% on a Mathematics exam, and 74% on an Economics exam. Which is Steven's better subject in comparison with the others in his group if the group means and SDs are 50 and 4 (Mathematics) and 70 and 8 (Economics)?

1

TR-8R scores 67% on a accuracy exam, and 38% on an stamina exam. Which is TR-8R's better attribiute in comparison with the others in his group if the group means and SDs are 55 and 8 (Accuracy) and 24 and 4 (Stamina)?

1

A population of scores has μ = 42. In this population, an X value of 40 corresponds to z = -0.50. What is the population standard deviation?

1

A squadron of scores has μ = 63. In this clone squadron, an X value of 54 corresponds to z = -3. What is the clone squadron's standard deviation?

1

For a population with μ = 60 and σ = 8, what is the X value corresponding to z = -0.50?

1

For a population with μ = 78 and σ = 5, what is the X value corresponding to z = 0.8?

1

A population of scores has μ = 44. In this population, an X value of 40 corresponds to z = -0.50. What is the population standard deviation?

1

A population of N = 5 scores has SS = 40. What is the variance for this population?

1

Under what circumstances would a score that is 15 points above the mean be considered an extreme score?

1

For a population with μ = 100 and σ = 20, the X value corresponding to z = 1.50 is

1

A population of scores has σ = 20. In this population, a score of X = 80 corresponds to z = +0.25. What is the population mean?

1

In N = 25 games last season, the college basketball team averaged μ = 74 points with a standard deviation of σ = 6. In their final game of the season, the team scored 90 points. Based on this information, the number of points scored in the final game was ____.

1

What is the value of SS for the following sample?

Scores: 1, 3, 5

1

The Pearson correlation measures _____.

1

A scatter plot shows a set of data points that are widely scattered around a line that slopes down to the right. Which of the following values would be closest to the correlation for these data?

1

A scatter plot shows a set of data points that are closely scattered around a line that slopes down to the left. Which of the following values would be closest to the correlation for these data?

1

A Pearson correlation of r = +1.00 between X and Y indicates _____.

1

A Pearson correlation of r = -1.00 between X and Y indicates _____.

1

Which of the following sets of correlations correctly shows the highest to lowest degree of relationship?

1

The Pearson correlation is calculated for a sample of n = 25 individuals. What value of df should be used to determine whether or not the correlation is significant?

1

The results of a correlation analysis are as follows: r(72) = .56, p = .046. Calculate the coefficient of determination (R2):

1

The results of a correlation analysis are as follows: r(123) = .75, p = .034. Calculate the coefficient of determination (R2):

1

When we convert a score into a score from a probability distribution, it becomes a _______.

1

The p value is a conditional probability, and represents ________.

1

A researcher conducts an experiment and discovers a non-significant (p > .05) difference between her two experimental groups. What is the next step she should take?

1

The first step in hypothesis testing is to:

1

Which of the following is a two-tailed hypothesis?

1

Which of the following is an example of a null hypothesis?

1

Which of the following is the most appropriate description of a Type I error?

1

Which of the following is the most appropriate description of a Type II error?

1

A researcher conducts an experiment and discovers a significant (p < .05) difference between her two experimental groups. What is the next step she should take?

1

A researcher decides to run a correlation to discover whether a positive relationship exists between variable X and variable Y. He should conduct a _____.

1

An independent-measures t hypothesis test is appropriate when ____.

1

Which of the following research situations is most likely to use an independent-measures design?

1

A researcher reports t(24) = 5.30 for an independent-measures experiment. How many individuals participated in the entire experiment?

1

An independent-measures experiment uses one sample with n = 10 and a second sample with n = 15 to compare two experimental treatments. The t statistic from this experiment will have degrees of freedom equal to ____.

1

The results of an independent-measures research study are reported as "t(5) = -2.12, p = .67, two tails." What statistical decision was made?

1

Which of the following is a parametric test?

1

Which is NOT an assumption underlying Parametric tests?

1

What is the Pearson r in this correlation?

1

What is the P value in this Pearson correlation?

1

What is the sample size used?

1

What is the P value and can we reject the null hypothesis?

1

There is a _______ % chance of the results being obtained by sampling error alone

1

What does reliability mean?

1

What does validity mean?

1

Which is NOT a method of assessing reliability?

1

What is the correct order for hypothesis testing?

1

What is the critical region in relation to a normal distribution?

1

What is the SS of the following numbers? 5,7,1,4

1

Chocolate will positively correlate with happiness. What type of directional hypothesis is this?

1

In a set of data with extreme scores what would be the best measure of central tendency?

1

Repeated measures, normally distributed, Violation of homogeneity of variance. What statistical test should be used?

1

Independent groups, Normally distributed, Violation of homogeneity of variance. What statistical test should be used?

1

The standard error is...

1

What is t when the sample mean is 36 and the population mean in 57 and a standard error of 5.6?

1

In relation to Cohen's d what are the effect sizes?

1

If two variables are totally independent, then the correlation between them is:

1

In an independent t-test, you would use the equal variances are not assumed part of the output when Levene's test is

1

Levene's test is:

1

We can't use a single t-test to compare:

1

How many t-test comparisons would you need to conduct as follow ups, if there are 8 levels in the factor?

1

What is the main problem with using multiple t-tests?

1

The narrower the confidence intervals:

1

Repeated measures designs are:

1

Sample means are:

1

For an experiment comparing two treatment conditions, an independent-measures design would obtain score(s) for each subject and a repeated-measures design would obtain score(s) for each subject.

1

A repeated-measures study finds a mean difference of MD = 5 points between two treatment conditions. Which of the following sample characteristics is most likely to produce a significant t statistic for the hypothesis test?

1

For which of the following situations would a repeated-measures research design be appropriate?

1

A research report describing the results from a repeated-measures study includes the following: "The data show no significant difference between the two treatments, t(10) = 1.65, p = .07." Based on this report, you can conclude that a total of ____ individuals participated in the research study .

1

For the repeated-measures t statistic, df = ____.

1

A repeated-measures experiment and a matched-subjects experiment both produce t statistics with df = 20. Which experiment used more subjects?

1

Which of the following sets of data is most likely to produce a significant t statistic? NB: MD = Mean Difference, SS = Sum of Squared Deviations

1

If the null hypothesis is true, on average the expected value for the related-samples t statistic is ____.

1

A research report describing the results from a repeated-measures study states, "The data showed a significant difference between treatments, t(22) = 4.71, p < .001." From this report you can conclude that the outcome of the hypothesis test was ____.

1

The purpose for post tests is

1

In general, the largest F-ratio will be obtained when the differences between sample means are and the magnitudes of the sample variances are .

1

In analysis of variance, the F-ratio is a ratio of?

1

In analysis of variance, the term factor refers to ____.

1

When the null hypothesis is true for an ANOVA, what is the expected value for the F-ratio?

1

For an experiment comparing more than two treatment conditions you should use analysis of variance rather than separate t tests because ____.

1

Under what circumstances is the experimentwise alpha level a concern?

1

How many levels did the independent variable have?

1

Which of the following statistical statements best describes the result of the analysis:

1

How many participants were included in this analysis?

1

A study finds a correlation coefficient of 0.5, what amount of variance is left unexplained?

1

A study finds an effect size of 64%, what is the value of Pearson's r?

1

What is the basis or logic of inferential statistical tests?

1

Power of an experiment is:

1

How do we denote power?

1

Quasi-experimental designs have?

1

The higher the t-value, the more likely it is that the differences between groups are:

1

The effect size for independent groups, d, can be calculated by:

1

Power is the ability to detect:

1

A researcher has found a correlation coefficient of r=+.3, CI(95%) = -.2 - (+.7). Which is the most sensible conclusion? We are 95% confident that the population regression line would be:

1

When the between-groups variance is a lot larger than the within-groups variance, the F-value is _ and the likelihood of such a result occurring by sampling error .

Taken from the homework. i have added questions to test your knowledge on statistics

Research Methods II potential MCQ's

Steven scores 55% on a Mathematics exam, and 74% on an Economics exam. Which is Steven's better subject in comparison with the others in his group if the group means and SDs are 50 and 4 (Mathematics) and 70 and 8 (Economics)?

TR-8R scores 67% on a accuracy exam, and 38% on an stamina exam. Which is TR-8R's better attribiute in comparison with the others in his group if the group means and SDs are 55 and 8 (Accuracy) and 24 and 4 (Stamina)?

A population of scores has μ = 42. In this population, an X value of 40 corresponds to z = -0.50. What is the population standard deviation?

A squadron of scores has μ = 63. In this clone squadron, an X value of 54 corresponds to z = -3. What is the clone squadron's standard deviation?

For a population with μ = 60 and σ = 8, what is the X value corresponding to z = -0.50?

For a population with μ = 78 and σ = 5, what is the X value corresponding to z = 0.8?

A population of scores has μ = 44. In this population, an X value of 40 corresponds to z = -0.50. What is the population standard deviation?

A population of N = 5 scores has SS = 40. What is the variance for this population?

Under what circumstances would a score that is 15 points above the mean be considered an extreme score?

For a population with μ = 100 and σ = 20, the X value corresponding to z = 1.50 is

A population of scores has σ = 20. In this population, a score of X = 80 corresponds to z = +0.25. What is the population mean?

In N = 25 games last season, the college basketball team averaged μ = 74 points with a standard deviation of σ = 6. In their final game of the season, the team scored 90 points. Based on this information, the number of points scored in the final game was ____.

What is the value of SS for the following sample? Scores: 1, 3, 5

The Pearson correlation measures _____.

A scatter plot shows a set of data points that are widely scattered around a line that slopes down to the right. Which of the following values would be closest to the correlation for these data?

A scatter plot shows a set of data points that are closely scattered around a line that slopes down to the left. Which of the following values would be closest to the correlation for these data?

A Pearson correlation of r = +1.00 between X and Y indicates _____.

A Pearson correlation of r = -1.00 between X and Y indicates _____.

Which of the following sets of correlations correctly shows the highest to lowest degree of relationship?

The Pearson correlation is calculated for a sample of n = 25 individuals. What value of df should be used to determine whether or not the correlation is significant?

What is the value of SS for the following sample?

Scores: 1, 3, 5