500 randomly selected university students were selected for a study on smoking status and stress levels. At the time of the study, students were asked to rate their stress levels on a scale of 0 - 100 with 0 indicating no stress. Students were also asked to disclose whether they were a non-smoker, a light smoker, or a heavy smoker. Of the 500 students, 75 identified themselves as heavy smokers, 150 identified themselves as light smokers, and 275 identified themselves as non-smokers. The average stress level reported for heavy smokers was 60.4. The average stres level reported for light smokers was 45.7. The average stress level reported by non-smokers was 56.6. Which of the following statements is true?

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7. 500 randomly selected university students were selected for a study on smoking status and stress levels. At the time of
the study, students were asked to rate their stress levels on a scale of 0 - 100 with 0 indicating no stress. Students were
also asked to disclose whether they were a non-smoker, a light smoker, or a heavy smoker.
Of the 500 students, 75 identified themselves as heavy smokers, 150 identified themselves as light smokers, and 275
identified themselves as non-smokers. The average stress level reported for heavy smokers was 60.4. The average stress
level reported for light smokers was 45.7. The average stress level reported by non-smokers was 56.6. Which of the
following statements is true?
On average, heavy smokers have stress values of 3.8 units greater than non-smokers.
On average, heavy smokers have stress values of 3.8 unit less than non-smokers.
On average, heavy smokers have stress values of 3.8 times less than the stress levels of non-smokers.
On average, heavy smokers have stress values of 3.8 times the stress levels of non-smokers.
Transcribed Image Text:7. 500 randomly selected university students were selected for a study on smoking status and stress levels. At the time of the study, students were asked to rate their stress levels on a scale of 0 - 100 with 0 indicating no stress. Students were also asked to disclose whether they were a non-smoker, a light smoker, or a heavy smoker. Of the 500 students, 75 identified themselves as heavy smokers, 150 identified themselves as light smokers, and 275 identified themselves as non-smokers. The average stress level reported for heavy smokers was 60.4. The average stress level reported for light smokers was 45.7. The average stress level reported by non-smokers was 56.6. Which of the following statements is true? On average, heavy smokers have stress values of 3.8 units greater than non-smokers. On average, heavy smokers have stress values of 3.8 unit less than non-smokers. On average, heavy smokers have stress values of 3.8 times less than the stress levels of non-smokers. On average, heavy smokers have stress values of 3.8 times the stress levels of non-smokers.
8. The distributions of male and female blood glucose levels are similar in shape. The mean difference between male and
female blood glucose levels was 10.4 (females are reference group). This difference represents which of the following
(check all that apply)?
On average, females have 10.4 mg/dl lower blood glucose levels than males.
On average, males have 10.4 mg/dl higher blood glucose levels than females.
The distribution of female glucose values would be shifted approximately 10.4 units less than the mean of males.
All males have 10.4 higher mg/dl blood glucose than all females.
Transcribed Image Text:8. The distributions of male and female blood glucose levels are similar in shape. The mean difference between male and female blood glucose levels was 10.4 (females are reference group). This difference represents which of the following (check all that apply)? On average, females have 10.4 mg/dl lower blood glucose levels than males. On average, males have 10.4 mg/dl higher blood glucose levels than females. The distribution of female glucose values would be shifted approximately 10.4 units less than the mean of males. All males have 10.4 higher mg/dl blood glucose than all females.
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