Questions from Statistics

Q: A random sample of people were asked whether they were athletic,

A random sample of people were asked whether they were athletic, moderately athletic (Mod), or not athletic (NotAth). Then they were tested for reaction speed. Reaction speed was measured indirectly,...

Q: Professors of ethics (Eth), professors of philosophy (Phil),

Professors of ethics (Eth), professors of philosophy (Phil), and professors in fields other than philosophy or ethics (Other) were asked what percentage of their income professors should donate to cha...

Q: Professors of ethics (Eth), professors of philosophy (Phil),

Professors of ethics (Eth), professors of philosophy (Phil), and professors in fields other than philosophy or ethics (Other) were asked what percentage of income they actually donated to charity. Ass...

Q: The StatCrunch output shows the ANOVA results for testing whether there is

The StatCrunch output shows the ANOVA results for testing whether there is an association between the number of hours of TV watched per week and age group: 50 and over (AdultTV), college students (Tee...

Q: In a study done on a random sample of employees at a

In a study done on a random sample of employees at a company, the employees wrote down how many hours they slept and their health status. StatCrunch output for an ANOVA is shown. Test the hypothesis t...

Q: StatCrunch surveyed users on happiness. Each respondent scored herself or himself

StatCrunch surveyed users on happiness. Each respondent scored herself or himself between 1 (least happy) and 100 (most happy). We would like to determine whether age category has an effect on happine...

Q: In a 2018 study by Hurst and Fukuda published in BMJ Open

In a 2018 study by Hurst and Fukuda published in BMJ Open, researchers in Japan surveyed 59,717 participants in Japan who had Type 2 diabetes. Participants were asked to rate their eating speed as Slo...

Q: Critically ill patients are often given intravenous fluids in hospital, either

Critically ill patients are often given intravenous fluids in hospital, either in the form of balanced crystalloids or saline solutions. In a 2018 study published in The New England Journal of Medicin...

Q: A study reported in the New England Journal of Medicine was conducted

A study reported in the New England Journal of Medicine was conducted to compare outcomes for radial arterial grafts and saphenous-vein grafts in coronary artery bypass surgeries (Gaudino et al. 2018)...

Q: Does frequent use of acetaminophen lead to asthma-related complications among

Does frequent use of acetaminophen lead to asthma-related complications among children? Excerpts from the abstract of a study published in The New England Journal of Medicine about this are given (She...