In a study on a new cholesterol screening tool at CHOC hospital, 3000 individuals were screened, and 1600 tested negative. Among individuals diagnosed without high cholesterol, 600 received negative results. Among those confirmed with high cholesterol level, 1000 tested positive. Calculate the sensitivity, specificity, PPV, NPV of the cholesterol screening test.
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- What is meant by the sample space of an experiment?It is known through Operation Laban Altapresyon that 15% of adults from the Province of Realeza are hypertensive. Princess recently conducted a survey to determine the prevalence of high blood pressure among the towns of the Province of Realeza. Her findings are tabulated below.The sales rep of a waterbed claims that 25% of the Filipino died because of cardiovascular diseases. A researcher wants to test this claim. A hospital record shows that out of a random sample of 200 dead patients, 55 patients died because of cardiovascular diseases. Does the data provide sufficient evidence to support the claim of the sales rep? Use 0.03 level of significance.
- A metropolitan police agency is studying the incidence of drivers operating their vehicles with expired driving license. The data collected from drivers who have been stopped by an officer for a traffic law violation and a traffic summons issued. Data in the below table show the number of drivers with an expired driving license (considered as nonconformities) with an average of 45 drivers stopped by an officer. Sample Number of drivers with an expired driving license Use the attached Excel file to solve this question, provide your answers and screenshots below. Set up a control chart for the average number of nonconformities per unit (u-Chart) for this data -Do you think it would have been more accurate and easier to plot the C-Chart in this case instead of the U-Chart? Explain your answerIt is known through Operation Laban Altapresyon that 15% of adults from the Province of Realeza are hypertensive. Princess recently conducted a survey to determine the prevalence of high blood pressure among the towns of the Province of Realeza. Her findings are tabulated below. Given the provided data, identify if there has been a change in the prevalence of hypertension in the town of San Luis. What is the computed test statistic?A study is designed to evaluate the impact of a daily multivitamin on students’ academic performance. One hundred sixty students are randomly assigned to receive either the multivitamin or a placebo and are instructed to take the assigned drug daily for 20 days. On day 20, each student takes a standardized exam and the mean exam scores are compared between groups. Identify what type of study this is.
- I’m interested in whether or not kids get hyper based on the type of drink they consume. I measure/define “hyper” as the time they spend running around. I recruited six kids to try 4 different drinks: water (my control), milk, Coke, and Coffee. I record the time (in minutes) spent running around after consuming each beverage. Using the data below, run a repeated measures ANOVA and assess whether the type of beverage impacts how much time kids spend active at an alpha level of 0.05. Kid Water Milk Coke Coffee Row means 1 5 3 10 12 2 6 3 12 15 3 4 4 9 14 4 4 4 14 16 5 7 4 13 15 6 5 3 10 15 What is the null hypothesis? What is the alternative hypothesis? What is my total df? ___________ Between-groups (Drink) df? ___________ Between-persons df? ___________ Error df? _____________ What is the critical F value? _______________ Fill in the ANOVA…Create a drawing or plan for a 2 X 3 experimental design that would be appropriate for a factoral ANOVA. Identity the independent and dependent variables. Create a drawing or plan for a 3 X 3 experimental design that would be appropriate for a factoral ANOVA. Identity the independent and dependent variables.I’m interested in whether or not kids get hyper based on the type of drink they consume. I measure/define “hyper” as the time they spend running around. I recruited six kids to try 4 different drinks: water (my control), milk, Coke, and Coffee. I record the time (in minutes) spent running around after consuming each beverage. Using the data below, run a repeated measures ANOVA and assess whether the type of beverage impacts how much time kids spend active at an alpha level of 0.05. Kid Water Milk Coke Coffee Row means 1 5 3 10 12 2 6 3 12 15 3 4 4 9 14 4 4 4 14 16 5 7 4 13 15 6 5 3 10 15 1. Fill in the ANOVA summary tables below: Source Sum of Squares df MS (Variance) F Between-groups (Drink) ________ 3 _____ _____ Error ________ _____ _____ Total ________ _____ Source Sum of Squares df…
- A random sample of 125 hypertensive and 150 normal senior citizens were asked if they read nutrition labels on food products. Results are presented below. (Check image) Is there an evidence of a significant difference between the proportions of hypertensive and normal senior citizens who read nutrition labels? Use a 5% level of significance.Suppose an epidemiologic investigation of people entering a STD clinic is performed. It is found that 160 of 200 patients who are diagnosed as having gonorrhea and 50 of 105 patients who are diagnosed as having nongonococcal urethritis have had previous episode of urethritis. Is there any association between present diagnosis and prior episodes of urethritis? (Calculation: test statistic=32.17). Use the data in the table to test the claim, at alpha=0.05, that type of crime is independent of whether the criminal is a stranger (Calculation: Test statistics=119.33) Observed Homicide Robbery Assault Criminal was a stranger 12 379 727 Criminal was a relative 39 106 642A Chinese cell-phone manufacturer exclusively uses robots in one of its factories. A random test run results in 23 defective assemblies out of 500. Does this data suggest that the true percentage of defectives is less than 5%? Use NATDRC.