Questions from Essentials of Statistics

Q: For the following scores, / a. Sketch a

For the following scores, a. Sketch a scatter plot and estimate the Pearson correlation. b. Compute the Pearson correlation.

Q: For the following scores, / a. Sketch a

For the following scores, a. Sketch a scatter plot and estimate the Pearson correlation. b. Compute the Pearson correlation.

Q: For the following scores, / a. Compute SS

For the following scores, a. Compute SS for X and Y and SP. b. Compute the Pearson correlation.

Q: The scores below are a modification of the scores in Problem 6

The scores below are a modification of the scores in Problem 6: a. Compute SS for X and Y and SP. Compare these values to your answer for part a of Problem 6. b. Compute the Pearson correlation. Compa...

Q: For the following scores, / a. Sketch a

For the following scores, a. Sketch a scatter plot and estimate the value of the Pearson correlation. b. Compute the Pearson correlation.

Q: With a small sample, a single point can have a large

With a small sample, a single point can have a large effect on the magnitude of the correlation. To create the following data, we started with the scores from Problem 8 and changed the first X value f...

Q: Earlier in the chapter, we introduced the chi-square test

Earlier in the chapter, we introduced the chi-square test of independence with a study examining the relationship between personality and color preference. The following table shows the frequency dist...

Q: For the following set of scores, find the value of each

For the following set of scores, find the value of each expression:

Q: Liu et al. (2015) recently reported the results of

Liu et al. (2015) recently reported the results of a study examining whether happy people live longer. The study followed a large sample of British women, aged 50 to 69 over a 10-year period. At the b...

Q: Many businesses use some type of customer loyalty program to encourage repeat

Many businesses use some type of customer loyalty program to encourage repeat customers. A common example is the buy-ten-get-one-free punch card. Drèze and Nunes (2006) examined a simple v...