Mathematics, 24.06.2019 11:50 Bryson2148
Most alpine skiers and snowboarders do not use helmets. do helmets reduce the risk of head injuries? a study in norway compared skiers and snowboarders who suffered head injuries with a control group who were not injured. of 578 injured subjects, 96 had worn a helmet. of the 2992 in the control group, 656 wore helmets. state: is helmet use less common among skiers and snowboarders who have head injuries? follow the four‑step process to answer the questions about this study. (note that this is an observational study that compares injured and uninjured subjects. an experiment that assigned subjects to helmet and no‑helmet groups would be more convincing.) plan: let and be the proportion of injured skiers and snowboarders who wear helmets and the proportion of uninjured skiers and snowboarders who wear helmets, respecti
Answers: 2
Mathematics, 21.06.2019 17:30
The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?
Answers: 1
Mathematics, 22.06.2019 00:00
Afair survey question is one that does not encourage biased responses. which survey question is fair? a.) do you agree that only unethical people take credit for other people’s work? b.) have you ever taken credit for somebody else’s work? c.) have you ever engaged in unethical behavior, such as taking credit for somebody else’s work? d.) don’t you think it is unethical to take credit for somebody else’s work?
Answers: 1
Most alpine skiers and snowboarders do not use helmets. do helmets reduce the risk of head injuries?...
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