Intro to Routing with Lab

Intro to Biostatistics

Total score: 10 out of 10, 100% Researchers studied a sample of 100 adults between the ages of 25 and 35 and found a strong negative correlation between annual salary and number of pounds the individual was overweight. Which of the following is correct? (a) This is strong, but not conclusive evidence that being overweight results in lower salaries. (b) In a plot of annual salary vs. the amount overweight, the general shape would be a negative sloping straight line. (c) The correlation would be stronger if a larger sample was chosen. (d) People with lower salaries cannot aﬀord healthy food and so tend to be overweight. 1 out of 1 This is correct. This is the general shape for a negative correlation between two variables. Text reference: Section 3.6 Facts about Correlation A study found a correlation of r = -0.61 between the gender of a worker and his or her salary. You may conclude that: (a) Women earn less than men on average. (b) Women earn $0.61 for every dollar earned by men. (c) Nothing can be concluded because correlation does not make sense here. (d) The relationship between salary and gender has a negative slope. 1 out of 1 This is correct. Correlation is not deﬁned between a categorical variable (gender) and a continuous variable (salary). Text reference: Section 3.6 Facts about Correlation The following is a scatterplot between the speed of an automobile (mph) and fuel economy (mpg): The approximate correlation between the two variables is: (a) 0. (b) 0.9. (c) -0.9. (d) Undeﬁned. 1 out of 1 This is correct. Correlation measures the linear relationship between two variables. Text reference: Section 3.6 Facts about Correlation A study is conducted to determine if one can predict the weight of a newborn baby based on the number of cigarettes smoked by the mother. The response variable for this study is: (a) the baby's weight. (b) the number of cigarettes smoked. (c) the correlation between these two values. (d) the ratio of the mean birth weight to the mean number of cigarettes smoked. 1 out of 1 This is correct. Text reference: Section 3.1 Explanatory and Response Variables A study is conducted to determine if one can predict the weight of a newborn baby based on the number of cigarettes smoked by the mother. Which of the following is correct? (a) The scatterplot should have the number of cigarettes on the X axis and the birth weight on the Y axis. (b) The scatterplot should have the number of cigarettes on the Y axis and the birth weight on the X axis. (c) The scatterplot should have the mother's weight on the X axis and the number of cigarettes on the Y axis. (d) The scatterplot should have the mother's weight on the Y axis and the baby's weight on the X axis. 1 out of 1 This is correct. Text reference: Section 3.2 Displaying Relationships: Scatterplots The following is a scatterplot between the speed of an automobile (mph) and fuel economy (mpg): Which of the following is correct? (a) There appears to be a positive association between speed and mpg. (b) There appears to be a negative association between speed and mpg. (c) The correlation is about 0.5. (d) The correlation is about 0. 1 out of 1 This is correct. Text reference: Section 3.5 Measuring Linear Association: Correlation A study is conducted to determine if one can predict the weight of a newborn baby based on the number of cigarettes smoked by the mother. Which of the following is correct? (a) The reported correlation is -1.2. Birthweight appears to decline with the amount of cigarettes smoked.

STAT | 219 | Intro to Biostatistics | assessment | Total score: 10 out of 10  100

NETW204_Wk1_Quiz.docx.docx-Question 1 1 / 1 pts

NETW204_W2_QUIZ.docx.docx-Score for this quiz:  10  out

NETW204_HW6.docx-HOMEWORK ASSIGNMENT Week 6 45 Points

 Question 1 2 out of 2 points Consider choosing four numbers from 1 to 10 with no repetitions allowed. Which of the following is correct? Selected Answer: The set 7, 8, 9, 10 has the smallest possible standard deviation. Correct Answer: The set 7, 8, 9, 10 has the smallest possible standard deviation. Response Feedback: This is correct. Text reference: Secti

Schools|Davenport University

Departments in Davenport University

NETW

NETW

Popular courses from Davenport University

Popular documents from Davenport University