Fundamentals of Biostatistics
8th Edition
ISBN: 9781305268920
Author: Bernard Rosner
Publisher: Cengage Learning
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Chapter 11, Problem 9P
Pulmonary
Suppose the
What test procedure can be used to compare the two correlation coefficients?
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random sample of 27 pairs of observations from a normal population gives a correlation coefficient of 0.42. Is it likely that the variables in the population are uncorrelated?
mean of x = 2.882, standard deviation = 1.634
Mean of y = 2.588, standard deviation = 0.246
The correlation coefficient is 0.159
Predict the GPA of someone who studies 10 hours per week.
Pearson correlation statistic is only valid when the relationship between the two quantitative (continuous) variables is
Chapter 11 Solutions
Fundamentals of Biostatistics
Ch. 11.12 - What is the difference between an ordinary...Ch. 11 - Hematology The data in Table 11.17 are given for 9...Ch. 11 - Hematology The data in Table 11.17 are given for 9...Ch. 11 - Hematology The data in Table 11.17 are given for 9...Ch. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - Hematology The data in Table 11.17 are given for 9...Ch. 11 - Prob. 8PCh. 11 - Pulmonary Function Suppose the correlation...
Ch. 11 - Prob. 10PCh. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - Hypertension The Update to the Task Force Report...Ch. 11 - Prob. 14PCh. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - Prob. 49PCh. 11 - Refer to Data Set BONEDEN.DAT at www.cengagebrain...Ch. 11 - Prob. 92PCh. 11 - Prob. 93PCh. 11 - Prob. 94PCh. 11 - Diabetes A group of 10-year-old boys were first...Ch. 11 - Prob. 118PCh. 11 - Prob. 119PCh. 11 - Prob. 120PCh. 11 - Prob. 121P
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- Describe about the correlation coefficient for quantitative data.arrow_forwardDetermine the linear correlation coefficient between commute time and well-being score. r = ____ 3 decimal placesarrow_forwardThe ages (in years) of 10 men and their systoluc blood pressures (in millimeters of mercury) are shown in thr attached data table with a sample correlation coefficient r of 0.904. Remove the data entry for the man who is 49 years old and has a systolic blood pressure of 198 millimeters of mercury from the data set and find the new correlation coefficient. Describe how this affecys the correlation coefficient r. Ages-18, 26,37,45,49,65,72,30,58,23 Systoluc blood pressure, y-109,121,141,130,198,183,199,132,176,118 The new correlation coefficient r going from 0.904 toarrow_forward
- A correlation coefficient should be used when the independent and dependent variable are measured as categorical nominal ordinal continuousarrow_forwardTest whether the correlation (without Northern Ireland) is statistically significant (i.e., significantly different from 0). Report the df and p-value of the testarrow_forwardI need correlation coefficient , critical values , conclusion reject or null please help I NEED IN 30 min thankyouarrow_forward
- Scenario: Is there a relationship between amount of time at a job (X) and productivity (Y)? The researcher quantified amount of time at a job by ranking the employees from those who had been there the least amount of time to the most. The researcher quantified productivity as rating the employees from "best" to "worst". Question: What is the most appropriate statistical test to conduct given this scenario? Pearson's r correlation Spearman correlation Point Biserial correlation Phi correlationarrow_forwardWhat is the Numerical Value of correlation coefficient?arrow_forwardThe Pearson's correlation coefficient between two variables, age and health, based on 16 observations is -0.48. Explain what is meant by a correlation coefficient. Test whether this age-health correlation coefficient has any statistically significant meaning at both the 10% and 5% level of significance.arrow_forward
- What are the key properties of correlation coefficient?arrow_forwardUse table of critical values of correlation coefficient.arrow_forwardThe means and standard deviations are given in the data table. With a correlation of 0.826, calculate the slope and explain what the slope tell you in the context of this problem. Calculate the intercept and explain what the intercept tell you in the context of this problem. For the individual with dose = 2.02, what is the predicted AZT concentration and what is the residual?arrow_forward
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