Benign prostatic hyperplasia is a noncancerous enlargement of the prostate gland that adversely affects the quality of life (QoL) of millions of men. A study of minimally invasive procedures for the treatment for this condition looked at pretreatment QoL (qol_base) and quality of life after 3 month on treatment (qol_3mo) The baseline data for 10 patients and their 3 month follow-up data is presented below: MAXFLO_B = maximum urine flow at baseline (urine flow measurement scale misplaced) MAXFLO3M = maximum urine flow after 3 months of treatment maxflo_b maxflo3m 7 8 18
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- Benign prostatic hyperplasia is a noncancerous enlargement of the prostate gland that adversely affects the quality of life (QoL) of millions of men. A study of minimally invasive procedures for the treatment for this condition looked at pretreatment QoL (qol_base) and quality of life after 3 month on treatment (qol_3mo) The baseline data for 10 patients and their 3 month follow-up data is presented below: MAXFLO_B = maximum urine flow at baseline (urine flow measurement scale misplaced) MAXFLO3M = maximum urine flow after 3 months of treatment maxflo_b maxflo3m 7 8 18 8 13 9. 16 11 8 4 12 10 8 14 10 13Tire pressure (psi) and mileage (mpg) were recorded for a random sample of seven cars of thesame make and model. The extended data table (left) and fit model report (right) are based on aquadratic model What is the predicted average mileage at tire pressure x = 31?1 of 15 > According to the World Health Organization (WHO), Body Mass Index (BMI) is a statistic that indicates the ratio of a person's weight to their body volume. The Center for Disease Control (CDC) uses the table to classify children from ages 2 to 20. Because BMI values change as children grow, the CDC uses percentiles rather than fixed values for BMI. Percentiles provide a basis of comparison for BMI over time. Weight status Percentile range Underweight Less than the 5th percentile Healthy weight 5th percentile to less than the 85th percentile Overweight Obese 85th to less than the 95th percentile Equal to or greater than the 95th percentile Based on data from WHO, a representative sample of 11-year-old females could consist of the following 15 values. 15.8, 16.1, 13.7, 15.3, 19.2, 14.7, 18.1, 16.8, 18.6, 19.9, 16.5, 17.7, 17.2, 27.0, 21.4 85th percentile: DELL 23 & 4 6 8. 9. e y i k + II .. ..
- Peak expiratory flow (PEF) is a measure of a patient’s ability to expel air from the lungs. Patients with asthma or other respiratory conditions often have restricted PEF. The mean PEF for children free of asthma is 306. An investigator conducts a study to investigate whether there is a difference in mean PEF in children with chronic bronchitis as compared to those without asthma or other respiratory conditions often have restricted PEF. Data on PEF are collected and summarized below. Based on the data, is there statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without? Run the appropriate test at = 0.05. Group Number of Children Mean PEF Std PEF Chronic Bronchitis 25 281 68 No Bronchitis 25 319 74Peak expiratory flow (PEF) is a measure of a patient’s ability to expel air from the lungs. Patients with asthma or other respiratory conditions often have restricted PEF. The mean PEF for children free of asthma is 306. An investigator conducts a study to investigate whether there is a difference in mean PEF in children with chronic bronchitis as compared to those without asthma or other respiratory conditions often have restricted PEF. Data on PEF are collected and summarized below. Based on the data, is there statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without? Run the appropriate test at alpha = 0.05. Group Number of Children Mean PEF Std Dev PEF Chronic Bronchitis 25 281 68 No Chronic Bronchitis 25 319 74Cardiovascular Disease Left ventricular mass (LVM) is an important risk factor for subsequent cardiovascular disease. A study is proposed to assess the relationship between childhood blood-pressure levels and LVM in children as determined from echocardiograms. The goal is to stratify children into a normal bp group (< 80th percentile for their age, gender, and height) and an elevated bp group (≥ 90th percentile for their age, gender, and height) and compare change in LVM between the two groups. Before this can be done, one needs to demonstrate that LVM actually changes in children over a 4-year period. To help plan the main study, a pilot study is conducted where echocardiograms are obtained from 10 random children from the Bogalusa Heart Study at baseline and after 4 years of follow-up. The data are given in Table 9.18 9.67 What is the test statistic for this test as applied to the data in Table 9.18? Hint: Assume that the large sample method of significance testing is valid for…
- indicator for gender (=1 if male, =0 if female). Your data set has 200 observations. donation = 1.57 + 0.12age + 0.08age? – 0.43 gender + 0.07(gender * age), R? = 0.33 (0.15)* (0.67) (0.11) (0.01) (0.06) donation = 1.59 (0.68) 0.46 gender, R² = 0.30 (0.17) 1. Assuming homoscedastic errors, test the hypothesis that age affects charitable donations at the 5% level. 2. Interpret the coefficient on gender interacted with age. 3. How would you test that the difference in giving between men and women is independent of age? If you can run the test, run it. If you cannot, explain what you need.Left ventricular mass (LVM) is an important risk factor for subsequent cardiovascular disease. A study is proposed to assess the relationship be- tween childhood blood pressure levels and LVM in children as determined from echocardiograms. The goal is to stratify children into a normal bp group (< 80th percentile for their age, gender, and height) and an ele- vated bp group (= 90th percentile for their age, gender, and height) and compare change in LVM between the 2 groups. Before this can be done, one needs to demonstrate that LVM actually changes in children over a 4-year period. To help plan the main study, a pilot study is conducted where echocardiograms are obtained from 10 random children from the Bogalusa Heart Study at baseline and after 4 years of follow-up. The data are given in Table 1 ID Baseline LVM (g) 1 1392 1343 86 4-year LVM (g) 163126142 Change (g) 24-856 4 98 96 -2 5 786 907 1028 73 82 9 9 93 77 -16 10 162 Mean 105.5 172 10 124.4 18.9 35.2…Distinguish Experimental Conditions from Experimental Unit.
- The Average final score was 78, the average midterm score was 80. The standard deviation for the average final midterm score was 4.5 and the standard deviation for the average midterm score was 5.5. The correlation coefficient is 0.76 Find the least squares regression line. Supposed that wanted to find to predict the final exam score based the midterm scorewhat does MSE (residual) mean in two way anovaWrite a clear conclusion regarding the association between height in inches and weight in pounds, using the multivariate model results