Questions from Statistics

Q: Monsanto hires independent university scientists to determine whether its new, GMO

Monsanto hires independent university scientists to determine whether its new, GMO (genetically modified organism) soybean poses any threat to consumers.

Q: Heights of adult American males are normally distributed with a mean of

Heights of adult American males are normally distributed with a mean of 69.0 inches and a standard deviation of 2.8 inches. The U.S. Marine Corps requires that males have heights between 64 inches and...

Q: Based on a random sample of movie lengths, the mean length

Based on a random sample of movie lengths, the mean length is 110.5 minutes with a standard deviation of 22.4 minutes. Assume that movie lengths are normally distributed. a. What percentage of movies...

Q: What is the 68-95-99.7 rule for

What is the 68-95-99.7 rule for normal distributions? Does it apply to other (not normal) distributions as well?

Q: For a normal distribution, approximately what fraction of data values lie

For a normal distribution, approximately what fraction of data values lie more than 1 standard deviation above the mean? When might data values be considered unusual? Explain.

Q: What is a standard score? How do you find the standard

What is a standard score? How do you find the standard score for a particular data value?

Q: Are there broad regions where melanoma mortality is more common than others

Are there broad regions where melanoma mortality is more common than others? Which ones, and what do they have in common? Figure 3.26

Q: What is a percentile? Describe how Table A-1 (

What is a percentile? Describe how Table A-1 (in Appendix A) allows you to relate standard scores and percentiles.

Q: My professor graded the final on a curve, and she gave

My professor graded the final on a curve, and she gave a grade of A+ to anyone who had a standard score of 2 or more.

Q: What is the Central Limit Theorem? When does it apply?

What is the Central Limit Theorem? When does it apply?