Questions from Essentials of Statistics

Q: In recent years, researchers have differentiated between two types of Internet

In recent years, researchers have differentiated between two types of Internet harassment: cyberbullying and Internet trolling. In a recent study of cyber harassment, a large sample of online particip...

Q: For a two-tailed test with a = .05,

For a two-tailed test with a = .05, use Table B.6 to determine how large a Pearson correlation is necessary to be statistically significant for each of the following samples: a. A sample of n = 6 b. A...

Q: It appears that there is a significant relationship between cognitive ability and

It appears that there is a significant relationship between cognitive ability and social status, at least for birds. Boogert, Reader, and Laland (2006) measured social status and individual learning a...

Q: In Problem 14, do the data suggest that increased learning ability

In Problem 14, do the data suggest that increased learning ability caused starlings to have greater social status? Explain. Problem 14:

Q: Problem 13 in Chapter 10 presented data demonstrating that participants who binge

Problem 13 in Chapter 10 presented data demonstrating that participants who binge-watched a television series enjoyed the show less than participants who watched the series in daily sessions. In the s...

Q: For the following set of scores: / a.

For the following set of scores: a. Construct a stem and leaf plot. b. What is the shape of the distribution?

Q: Sketch a graph showing the line for the equation Y = 2X

Sketch a graph showing the line for the equation Y = 2X - 1. On the same graph, show the line for Y = -X + 8.

Q: A set of n = 18 pairs of scores (X and

A set of n = 18 pairs of scores (X and Y values) has SSX = 16, SSY = 64, and SP = 20. If the mean for the X values is MX = 6 and the mean for the Y values is MY = 8: a. Calculate the Pearson correlati...

Q: Calculate SP (the sum of products of deviations) for the

Calculate SP (the sum of products of deviations) for the following scores. Note: Both means are decimal values, so the computational formula works well.

Q: A set of n = 15 pairs of scores (X and

A set of n = 15 pairs of scores (X and Y values) produces a regression equation of Y⁄ = 3X + 8. Find the predicted Y value for each of the following X scores: 1, 2, 3, and 6.