1) To evaluate whether hot or cold weather associated with increased suicide rates
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![What correlation method should be used in the following situations:
1) To evaluate whether hot or cold weather
V[ Choose ]
associated with increased suicide rates
Point-Biserial Correlation
Pearson Correlation
2) To evaluate whether company size (e.g.,
Spearman Correlation
500-999, 1000+ employees) related to
Phi-coefficient
company revenue.
3) To evaluate whether higher self-
[ Choose ]
handicapping scores are associated with
lower grade point average (GPA).
4) To evaluate the relationship between
[ Choose ]
between sex (male/female) and a dental visit
(yes/no) in the last twelve months](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3491097b-c4e6-449f-87de-271427efb09b%2Fbd89f175-408c-44a9-bcd2-edaf757e79e0%2F9f1ss2q_processed.jpeg&w=3840&q=75)
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- Which variable pair (in part a or b or c) has a stronger association according to the comparison of the correlations and which variable pair has a stronger association according to the comparison of the p-values? Does the comparisons according to correlation coefficients and p-values agree on which variable pair indicate the same stronger association? If not, why is there such a discrepancy? Which gene pair (in part a or b or c) has a stronger association do you think according to the scatter plots? Part A: Pearson correlation of rb: 0.380875 P-value of pb: 0.0000 Significance level: α = 0.05 So, there is statistically significant association at α = 0.5 between the genes. Also, since the p-value is less than 0.05, the null hypothesis is rejected. Furthermore, the magnitude and direction are that of a positive correlation between the provided genes. Part B: Pearson correlation of rb: 0.380875 P-value of pb: 0.0000 Significance level: α = 0.05 So, there is statistically significant…Discuss in general the use of the Sign Test for Matched Pairs, Rank-Sum Test and the Spearman Rank Correlation Test.When analyzing an association between two variables, the size of the correlation may be deceptive because of a.) a spurious association b.) range restriction c.) conflated data d.) poor statistical validity
- A bank records the number of mortgage applications and its own prevailing interest rate (at the first of the month) for each of 16 consecutive months. Is there a correlation between the interest rate (x) and the number of applicants (y), and if so, is it significant at the 5% or the 1% significance level Answer Choices -0.733, significant at 1% -0.652, no significant correlation -0.587, significant at 5% -0.587, significant at 1% -0.652, significant at 5%What is the most likely correlation value for this scatterplot?Which of the following conclusion would represent a Type II Error? Concluding that the movie will make a profit when it won’t Concluding that there is a statistically significance correlation in movie executives and movie types Concluding that the movie will not make a profit when it will Concluding that there is a statistically significance difference in movie types
- 11. We can increase the power of a correlational study by ___. Group of answer choices a. using measures with floor or ceiling effects b. using measures that are valid and reliable c. restricting the range of scores for each measure d. only using a very small randsom sampleA researcher hypothesizes that personality type is related to heart disease. Type A people, who are competitive and impatient are more prone to heart diseases. Type B people, who are more relaxed, are less likely to have heart problems. The following data about personality type and heart disorder are from a random sample. No heart disease heart disease total Type A 32 18 50 Type B 128 22 150 total 160 40 Do these data support that there is a significant relationship between personality type and heart disease? Test at the .05 level of significance. Compute the phi-coefficient to measure the strength of the relationship.Taylor Smith, a golf instructor, is interested in investigating the relationship between a golfer’s average driving distance and 18-hole score. She recently observed the performance of six golfers during one round of a tournament and measured, as accurately as possible, the distances (yards) of their drives and noted their final scores. She then computed each golfer’s average drive distance for 18 holes. The results of her sample are shown below. What are the sample covariance and sample correlation coefficient values?
- Based on a two-tailed t-test,what will be the conclusion of the significance test for this correlation be?A researcher assesses work ethic among college students using a self-report questionnaire. Moreover, the researcher tracks how many hours students seek out extra support at the tutoring center and with their professors on campus during the semester. The researcher determines that there is a significant positive relationship between self-reported work ethic and the number of hours students seek out extra support at the tutoring center and with their professors during the semester. This demonstrates how correlations can be used to demonstrate _____.Based on the correlation coefficient between scores on U of W Pain Inventory and the Marlowe-Crowne Reaction Inventory, is the obtained correlation coefficient consistent with the possibility that people with high levels of social desirability tend to say they would not react strongly when presented with a painful stimulus? Hint: Should the correlation coefficient between the Marlowe-Crowne Reaction Inventory and the U of W Pain Inventory be positive or negative if the “tough is socially desirable” hypothesis is true? In answering this question, you may assume that correlations that are less than +/- 0.2 are equivalent to zero.