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Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results.
|
Patient |
7-Minute Screen |
Cognitive Series |
|
A |
3 |
7 |
|
B |
7 |
15 |
|
C |
4 |
14 |
|
D |
5 |
13 |
|
E |
7 |
9 |
|
F |
5 |
15 |
|
G |
11 |
25 |
Compute the Pearson
r =
Do not round
The sums are,
| 7-Minute screen(x) | Cognitive Series (y) | x | xy | |
| 3 | 7 | 9 | 49 | 21 |
| 7 | 15 | 49 | 225 | 105 |
| 4 | 14 | 16 | 196 | 56 |
| 5 | 13 | 25 | 169 | 65 |
| 7 | 9 | 49 | 81 | 63 |
| 5 | 15 | 25 | 225 | 75 |
| 11 | 25 | 121 | 625 | 275 |
Step by step
Solved in 2 steps
- What is meant by the sample space of an experiment?Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study: Patient 7-Minute Screen Cognitive Tests A 3 11 B 8 19 C 10 22 D 8 20 E 4 14 F 7 13 G 4…Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. Patient 7-Minute Screen Cognitive Series A 3 7 B 7 15 C 4 14 D 5 13 E 7 9 F 5 15 G 11 25 my Pearson Correlation Coefficient r was less than, would I say we fail to reject the null concluding that there is not a significant etc. but when explaining the correlation for the apa do I still say the correlation is positive and large ?
- Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. Scores in 7minute-screen (Y) Scores in Cognitive series (X) 0 11 4 19 6 22 8 20 5 14 4 13 i) Find the regression equation for predicting 7-minute screen scores (Y) from the Cognitive series scores (X). ii) What is the value of standard error of estimate?Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. Scores in 7minute-screen (Y) Scores in Cognitive series (X) 0 11 4 19 6 22 8 20 5 14 4 13 A) Calculate the Pearson correlation for these data. B) If the researchers centered the variable of 7-minute screen (i.e., every score in this variable minus its Mean), what would be the new value of correlation? C) Is the correlation statistically significant? Use a two-tailed test with α = .05.Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. Patient 7-Minute Screen Cognitive Series A 3 7 B 7 15 C 4 14 D 5 13 E 7 9 F 5 15 G 11 25 a.) Compute the Pearson Correlation Coefficient for these data. r = b.) The correlation is Group of answer choices Medium and negative Large and negative Large and positive Medium and positive c.) The alternative hypothesis in words for a two-tailed test is d.)If we use a two-tailed test with α = .01, the…
- Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. Patient 7-Minute Screen Cognitive Series A 3 7 B 7 15 C 4 14 D 5 13 E 7 9 F 5 15 G 11 25 Compute the Pearson Correlation Coefficient for these data. r = The correlation is: Medium and negative Large and negative Large and positive Medium and positive The alternative hypothesis in words for a two-tailed test is The correlation between the scores on the 7-minute screen test and the scores on the…Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. Patient 7-Minute Screen Cognitive Series A 3 7 B 7 15 C 4 14 D 5 13 E 7 9 F 5 15 G 11 25 The alternative hypothesis in words and null hypothesis in symbols for a two-tailed test isIdentifying individuals with a high risk of Alzheimer's disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. 7-Minute Screen Cognitive Series 3 11 8 19 10 22 8 20 4 14 7 13 4 9 5 20 14 25 Which statistical test would you select: Answer H0: Answer H1: Answer What is the coefficient that indicates the strength of the relationship? Answer =Answer What is the standard error? Answer What is the appropriate 95% CI? [ Answer , Answer ] What is the d-effect size? Answer What is the t-observed? Answer What is the actual p-value? Answer THREE decimal places…
- Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. Patient 7 minute screen Cognitive series A 3 11 B 8 19 C 10 22 D 8 20 E 4 14 F 7 13 G 4 9 H 5 20 I 14 25 a/b. Compute the Pearson correlation to measure the degree of relationship between the two test scores. Is the correlation statistically significant? Use a two-tailed test with α = .01. For this problem, complete the four stages of hypothesis testing by hand: Identify the two hypotheses…Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. Patient 7-Minute Screen Cognitive Series A 3 7 B 7 15 C 4 14 D 5 13 E 7 9 F 5 15 G 11 25 Compute the Pearson Correlation Coefficient for these data r = hence the The correlation isIdentifying individuals with a high risk of Alzeheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 3-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study: Scores of 3-Minute Screen from Patients ONE to NINE are 3, 8, 10, 8, 8, 7, 4, 5, and 14. Scores of the complete series of cognitive tests from Patients ONE to NINE are 11, 19, 22, 20, 14, 13, 9, 20, and 25. What is the Pearson’s product-moment correlation coefficient? Is the Pearson’s correlation coefficient statistically significant with a two-tailed test with alpha = 0.01? a. 0.835; it is larger than the critical values for the Pearson’s correlation 0.798: It is not statistically…
