Questions from Business Statistics

Q: It widely believed that regular mammogram screening may detect breast cancer early

It widely believed that regular mammogram screening may detect breast cancer early, resulting in fewer deaths from that disease. One study that investigated this issue over a period of 18 years was pu...

Q: The following data give the numbers of hurricanes classified as major hurricanes

The following data give the numbers of hurricanes classified as major hurricanes in the Atlantic Ocean each year from 1944 through 2013 (www.nhc.noaa.gov/data/): 3, 3, 1, 2, 4, 3, 8, 5, 3, 4, 2, 6, 2,...

Q: In 2001, the conclusion of the study outlined in Exercise 41

In 2001, the conclusion of the study outlined in Exercise 41 was questioned. A new 9-year study was conducted in Sweden, comparing 21,088 women who had mammograms with 21,195 who did not. Of the women...

Q: Researchers comparing the effectiveness of two pain medications randomly selected a group

Researchers comparing the effectiveness of two pain medications randomly selected a group of patients who had been complaining of a certain kind of joint pain. They randomly divided these people into...

Q: Candidates for political office realize that different levels of support among men

Candidates for political office realize that different levels of support among men and women may be a crucial factor in determining the outcome of an election. One candidate finds that 52% of 473 men...

Q: Political pundits talk about the bounce that a presidential candidate gets after

Political pundits talk about the bounce that a presidential candidate gets after his party convention. In the past 40 years, it has averaged about 6 percentage points. Just before the 2004 Democratic...

Q: A Time magazine article about a survey of men attitudes reported that

A Time magazine article about a survey of men attitudes reported that 11 of 161 black respondents and 20 of 358 Latino respondents responded Yes to the question Are you a stay-at-home dad? How big is...

Q: In the same article from Exercise 46 , Time magazine, reporting

In the same article from Exercise 46 , Time magazine, reporting on a survey of men attitudes, noted that Young men are more comfortable than older men talking about their problems. The survey reporte...

Q: Recently, the Gallup Poll asked 1005 U.S. adults

Recently, the Gallup Poll asked 1005 U.S. adults if they actively try to avoid carbohydrates in their diet. That number increased to 27% from 20% in a similar 2002 poll. Is this a statistically signif...

Q: GfK Roper Consulting gathers information on consumer preferences around the world to

GfK Roper Consulting gathers information on consumer preferences around the world to help companies monitor attitudes about health, food, and healthcare products. They asked people in many different c...