/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 2 The following two headlines conc... [FREE SOLUTION] | 91Ó°ÊÓ

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The following two headlines concern the same topic. Which one has language that suggests a cause-and-effect relationship, and which does not? Headline A: "Women Who Drink Coffee Are Less Prone to Depression" Headline B: "Coffee Prevents Depression"

Short Answer

Expert verified
Headline B 'Coffee Prevents Depression' suggests a cause-and-effect relationship. Headline A 'Women Who Drink Coffee Are Less Prone to Depression' does not suggest a cause-and-effect relationship.

Step by step solution

01

Examine Headline A

Firstly, we have to look at Headline A, 'Women Who Drink Coffee Are Less Prone to Depression'. This headline implies that among the women who drink coffee, there is a lower prevalence of depression. It doesn't establish a direct cause-and-effect relationship. It's possible the reduced proneness to depression could be due to other factors shared by coffee drinkers.
02

Examine Headline B

Next, we examine Headline B, 'Coffee Prevents Depression'. This headline directly states that coffee consumption leads to the prevention of depression, clearly implying a cause-and-effect relationship. 'Prevents' is a word that states causation. However, it’s important to review the entire article attached to such a headline as such a statement could be an oversimplification.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Statistical Language Interpretation
Understanding the nuances of statistical language is crucial when navigating the world of data. It allows us to interpret information accurately without jumping to unfounded conclusions.

For example, looking at the headlines from the exercise, Headline A states, 'Women Who Drink Coffee Are Less Prone to Depression.' It uses language that suggests a relationship or an association between drinking coffee and depression rates, but it wisely refrains from implying causation. In contrast, Headline B asserts, 'Coffee Prevents Depression,' which boldly claims a cause-and-effect without providing evidence.

Clearly, learning to distinguish between such statements can determine how we process and apply information from studies and reports. To enhance the comprehension of such headlines, we might use words like 'associated with' or 'linked to' when addressing a mere correlation, reserving phrases like 'causes' or 'prevents' for well-supported causative statements.
Correlation vs Causation
The distinction between correlation and causation is a fundamental concept in understanding statistics. Correlation refers to a mutual relationship or connection between two variables, where they tend to vary together, but without one necessarily causing the other.

In terms of the exercise provided, Headline A points to a correlation. Women drinking coffee happen to experience less depression, but it does not say one leads to the other. However, Headline B implies causation, as it states that coffee 'prevents' depression, suggesting that drinking coffee is the reason for the drop in depression rates.

Grasping this difference is vital because mistaking correlation for causation can lead to a misunderstanding of the data. When assessing such claims, we should ask if the study controls for other variables and if there is evidence of a direct cause-and-effect mechanism. Otherwise, we risk endorsing spurious relationships as factual.
Statistical Literacy
Statistical literacy is the ability to interpret, critically evaluate, and communicate about statistical information and ideas. In relation to our exercise, this means being able to understand what the headlines are truly suggesting and what information might be missing.

Headline A, which is more cautious, allows statistically literate individuals to recognize that more information is needed to draw a conclusion about causation. Meanwhile, Headline B might mislead those who lack statistical literacy into believing that coffee is a cure for depression, without any evidence presented. Enhancing statistical literacy involves asking critical questions about research methods, sample sizes, and potential biases in any data presented.

To foster statistical literacy, educators should encourage students to look beyond headlines, scrutinize the methodology of studies, and recognize the limitations of the data. Promoting a skeptical and inquiring mindset helps ensure that statistical information is used responsibly and accurately in forming opinions and decisions.

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Most popular questions from this chapter

Imagine two studies of an exercise program that designers claim will make people lose weight. The first study is based on a random sample of 100 men and women who follow the exercise program for 6 months. A hypothesis test is carried out to determine whether their mean weight change from the start of the program to 6 months following the program is negative. The second study was based on a random sample of 100 men (no women) who followed the exercise program for 6 months. The same hypothesis test is carried out to determine whether their mean weight change is negative. a. Which study will have more variability in the populations from which the samples are drawn? b. Assuming the exercise program is more effective for men than women, which study will have more power? Explain.

Fish Consumption and Arthritis A 2017 study reported in the Harvard Health Blog investigated the association between fish consumption and disease activity in 176 rheumatoid arthritis patients (Tedeschi et al. 2017). Frequency of fish consumption was assessed through a questionnaire. Researchers found that participants who consumed fish at least two times per week showed significantly lower disease activity (in other words, less inflammation associated with the disease) than participants who consumed never or less than one time per month. Does this study show that fish consumption causes lower disease activity in rheumatoid arthritis patients? Explain.

Smiling is a sign of a good mood, but can smiling improve a bad mood? Researchers plan to assign subjects to two groups. Subjects in both groups will rate their mood at the beginning of the study. Then subjects in the treatment group will be told to smile while they are asked to recount a pleasant memory. Subjects in the control group will also be asked to recount a pleasant memory, but they will not be told to smile. Both groups will again rate their moods, and researchers will determine whether the reported moods differ between the two groups. Because the initial, baseline mood rating might affect the outcome, after the first mood rating the subjects will be broken into two groups: one group with low ratings ("bad mood") and one with higher ratings ("good mood"). Patients in each group will then be randomly assigned to either the treatment group or the control group. Is this an appropriate use of blocking? If so, explain why. If not, describe a better blocking plan.

Evaluate the study based on the extracts from the study abstracts by answering the following questions: a. What is the research question that the investigators are trying the answer? b. What is their answer to the research question? c. What were the methods they used to collect data? d. Is the conclusion appropriate for the methods used to collect data? e. To what population do the conclusions apply? f. Have the results been replicated (reproduced) in other articles? Some researchers believe that dogs may be beneficial in reducing cardiovascular risk in their owners by providing social support and motivation for physical activity (Mubanga et al. 2017). The purpose of this study was to investigate the association of dog ownership with incident of cardiovascular disease in the population of Sweden. Read the following excerpts from the study abstract and evaluate the study using the given questions. Methods: All Swedish residents aged 40 to 80 years on January 1, 2001 \((n=3,987,937)\) were eligible for this study. The age range was chosen to exclude younger individuals at low risk of \(\mathrm{CVD}\) and the elderly at low odds of owning a dog. All Swedish residents are covered by the public health care system, and all hospital visits are registered in the National Patient Register. We obtained death data from the Cause of Death Register and incident disease data from the National Patient Register. The main diagnosis in inpatient and outpatient care and underlying cause of death were used to define four incident disease outcomes: (1) acute myocardial infarction, (2) heart failure, (3) ischemic stroke, and (4) hemorrhagic stroke. Any occurrence of these diagnoses was additionally considered as a composite cardiovascular disease (CVD) outcome ... Dog ownership was defined as periods registered or having a partner registered as a dog owner in either of the two dog registers (required for all dogs in Sweden.) Results: Dog ownership was inversely associated with risk of acute myocardial infarction, ischemic stroke, heart failure, and composite CVD. Dog ownership was inversely associated with cardiovascular mortality and all-cause mortality. Conclusions: Dog ownership was associated with a lower risk of incident cardiovascular disease in single-person households and with lower cardiovascular and all-cause mortality in the general population. Our observational study cannot provide evidence for a causal effect of dog ownership on cardiovascular disease or mortality. Although careful attention was paid to adjusting for potential confounders in a set of sensitivity analyses, it is still possible that personal characteristics that we did not have information about affect the choice of not only acquiring a dog, but also the breed and the risk of CVD.

In a 2017 study, researchers investigated the effect of dietary improvement on adults with moderate to severe depression (Jacka et al. 2017). Subjects were randomly assigned to a treatment group consisting of seven individual nutritional consulting sessions with a clinical dietician or a control condition consisting of a social support protocol with the same visit schedule and length as the treatment group. There were 33 subjects in the treatment group and 34 subjects in the control group. Remission from depression symptoms was achieved by 10 subjects in the treatment group and 2 subjects in the control group. a. Was this an observational study or a controlled experiment? Explain. b. Find the percentage in each group that achieved remission from depression symptoms. c. Researchers performed a test to determine if there was significant difference in outcomes between the treatment and control groups. The p-value for the test is 0.028. Based on a 0.05 significance level, choose the correct conclusion: i. Researchers have shown that dietary improvement may be an effective treatment strategy for patients with moderate to severe depression. ii. Researchers have not shown that dietary improvement may be an effective treatment strategy for patients with moderate to severe depression.

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