a. What is the sensitivity of this test? b. What is the specificity of this test? c. Suppose your grandmother receives a negative test result. What are the chances that she actually has dementia?
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Hi, I don't think you answered part c at all. Wouldn't you have to calculate the NPV? The ngeative predictive value?
- What is meant by the sample space of an experiment?What is an experiment?A study is designed to test whether there is a difference in mean daily calcium intake in adults with normal bone density, adults with osteopenia (a low bone density which may lead to osteoporosis) and adults with osteoporosis. Adults 60 years of age with normal bone density, osteopenia and osteoporosis are selected at random from hospital records and invited to participate in the study. Each participant's daily calcium intake is measured based on reported food intake and supplements. The data are shown below. Is there a statistically significant difference in mean calcium intake in patients with normal bone density as compared to patients with osteopenia and osteoporosis?
- What source of variation is found in an ANOVA summary table for a within subjects design that is not in an ANOVA summary table for a between subjects design. What happens to this source of variation in a between-subjects design?Please help me I tried multiple times, but still getting it wrongAn epidemiologist found five cases of “big toe cancer” in the Yukon Territory. Because there were only a few cases, the epidemiologist decided to conduct a matched case-control study to determine whether shoe size larger than 9 is a risk factor for big toe cancer. Cases were individually matched to one control for daily activity, history of athlete’s foot, and history of ingrown toenails. The following data were gathered: Shoe size > 9 Pair Case Control 1 Yes No 2 No No 3 No Yes 4 Yes Yes 5 No Yes Compute the proper measure of association. Interpret your results. If you were to investigate a rare cancer in Lynchburg, where might you look for data? What would be necessary legally and ethically to be able to utilize this data set(s)? Submit your thread by 11:59 p.m. (ET) on Thursday of Module/Week 3, and submit your replies by 11:59 p.m. (ET) on Sunday of the same module/week. 1
- Which is the best method of collecting data between interviews and focus groups in a social research?Researchers Regine Dilla and associates wanted to determine whether consumption of cola is associated with lower bone mineral density. They looked at 1125 men and 1413 women in the Framingham Osteoporosis Study, which is a cohort that began in 1971. The first examination in this study began between 1971 and 1975, with participants returning for an examination every 4 years. Based on results of questionnaires, the researchers were able to determine cola consumption on a weekly basis. Analysis of the results indicated that women who consumed at least one cola per day (on average) had a bone mineral density that was significantly lower at the femoral neck than those who consumed less than one cola per day. The researchers did not find this relation in men. (a)Why is this a cohort study? (b)What is the response variable in this study? What is the explanatory variable? (c)Is the response variable qualitative or quantitative?Alcohol abuse has been described by college presidents as the number one problem on campus, and it is an important cause of death in young adults. How common is it? A survey of 119 randomly selected U.S. college students collected information on drinking behavior and alcohol-related problems. The researchers defined “frequent binge drinking” as having five or more drinks in a row three or more times in the past two weeks. According to this definition, 41 students were classified as frequent binge drinkers. Use the data to construct and interpret a 98% confidence interval for the percentage of students who are “frequent binge drinking”. Procedure: Assumptions: (select everything that applies) Population standard deviation is unknown Population standard deviation is known Sample size is greater than 30 Normal population The number of positive and negative responses are both greater than 10 Simple random sample Unknown parameter:
- A forensic psychologist is interested in assessing the prevalence of major depressive disorders among a sample of prison inmates. A random sample of inmates was selected and tested on the MDI (Major Depressive Inventory), a self-report instrument designed to measure levels of depression. Their scores were: 8, 10, 4, 11, 7, 10, 13, 4, 8, 7, 9, 3, 15, 10, 10, 10, & 13. a.) Use descriptive statistics including sample size, skewness, kurtosis, mean, median, mode, range, and standard deviation to describe this sample. Write your results in a paragraph similar to the Results section of a manuscript. b.) If the MDI has a µ = 10, is the depression of prison inmates significantly different than that of the general population? Test with an α = 0.05. c.) What type of error is possible based on the outcome? I need help learning these questions.Identify the (a)population and (b) sample in the study. A quality-control manager randomly selects 70 bottles of ketchup that were filled on July 17 to assess the calibration of the filling machine. Researchers want to determine whether or not higher folate intake is associated with a lower risk of hypertension (high blood pressure) in women (27 to 44 years of age). To make this determination, they look at 7373 cases of hypertension in these women and find that those who consume at least 1000 micrograms per day (µg/d) of total folate had a decreased risk of hypertension compared with those who consume less than 200 µg/d.Twenty samples of students from the first year were taken for the study related to student emotional intelligence (EQ) in a university. The researcher has collected the data for a few variables: gender, academic performance, and emotional intelligence (EQ) test score. EQ Training and Coaching(T & C) Programme EQ Score No Gender CGPA (Before Attend T & C) EQ Score (After Attend T & C) 1 Male 2.10 444 526 2 Female 4.00 780 862 3 Male 2.30 475 557 4 Male 2.40 490 572 5 Female 3.80 755 837 6 Female 3.90 766 848 7 Male 2.70 540 622 Male 3.10 623 705 9 Male 2.90 600 682 10 Male 3.00 620 702 11 Male 2.50 505 590 12 Female 3.20 640 725 13 Male 2.60 523 608 14 Female 3.40 700 785 15 Female 3.50 710 795 16 Female 3.60 726 811 17 Female 3.70 740 825 18 Male 2.80 550 635 19 Female 3.30 685 770 20 Male 2.20 460 545 Table 1 Remarks: (1) Range of CGPA: 0 to 4 (2) Range of EQ Score: 0 to 900 To analysis the relationship between students' academic performance and emotional intelligence (EQ) in the…