Questions from Statistics

Q: a. Is the elevation change more from B to D or

a. Is the elevation change more from B to D or from D to F? b. What is the elevation change if you walk from A to C to D to A? Figure 3.27

Q: Nielsen Media Research determined the precise proportion of all Americans watching the

Nielsen Media Research determined the precise proportion of all Americans watching the Super Bowl by conducting a survey of a few thousand households.

Q: Although Nielsen surveys only a few thousand households out of the millions

Although Nielsen surveys only a few thousand households out of the millions that own TVs, they have a good chance of getting an accurate estimate of the proportion of the population watching the Super...

Q: Our study measured the birth weights and incidence of jaundice among a

Our study measured the birth weights and incidence of jaundice among a sample of babies born at our hospital, and we found x‾ = 6.7 pounds and p̂ = 0.45, or 45% showed signs of jaundice.

Q: For a random sample of 575 randomly selected car batteries, it

For a random sample of 575 randomly selected car batteries, it was found that their output had a mean of 12.2 volts and a standard deviation of 1.4 volts.

Q: A college has 3427 enrolled students. When 50 of them were

A college has 3427 enrolled students. When 50 of them were randomly selected for a survey, it was found that 10% of them were in favor of fees for parking permits.

Q: Among all of the 50,000 aspirin tablets produced by a

Among all of the 50,000 aspirin tablets produced by a pharmaceutical company over a given period, a sample of 200 tablets is tested and it is found that 4% of them do not meet specifications.

Q: Among all of the 50,000 aspirin tablets produced by a

Among all of the 50,000 aspirin tablets produced by a pharmaceutical company over a given period, a sample of 200 tablets is tested and the mean amount of aspirin in these tablets is found to be 328 m...

Q: In a clinical trial, 11,000 male physicians were treated

In a clinical trial, 11,000 male physicians were treated with aspirin and another 11,000 male physicians were given a placebo. A variable of interest was the proportion of heart attacks among the phys...

Q: When 50 adult females were randomly selected and their pulse rates were

When 50 adult females were randomly selected and their pulse rates were measured, the mean of 75.5 beats per minute (bpm) was obtained. When the sample size was increased to 147 adult females, the mea...