An advertising firm conducts 3 different campaigns, each in 14 different cities, to promote a certain product, and tracks the product sales attributable to each campaign in each city. Determine whether the study is observational or designed.
A) observational B) designed
Question 2
An educator wanted to look at the study habits of university students.
As part of the research, data was collected for three variables - the amount of time (in hours per week) spent studying, the amount of time (in hours per week) spent playing video games and the GPA - for a sample of 20 male university students. As part of the research, a 95 confidence interval for the average GPA of all male university students was calculated to be: (2.95, 3.10). Which of the following statements is true?
A) In construction of the confidence interval, a t-value with 19 degrees of freedom was used.
B) In construction of the confidence interval, a t-value with 20 degrees of freedom was used.
C) In construction of the confidence interval, a z-value with 20 degrees of freedom was used.
D) In construction of the confidence interval, a z-value was used.
The nurse conducts the health history as the first step in the nursing assessment
Rebound Tenderness, Apply Firm Pressure to the Abdomen
W. A. Rogers’s engraving, “Out of the Game,” showed one injured boy tending to another. It appeared
A Global Bloom: Cities With Over One Million Residents
Advertising Break-even Question
Increase in total spending in presidential campaigns, 1976-2020