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Is it better to have a wide confidence interval or a narrow confidence interval?
Narrow because there is less of a chance for people to mess up
Is it true that the wider the confidence interval the less precise is the estimate?
All things being equal, a wider confidence interval (CI) implies a higher confidence. The higher confidence you want, the wider the CI gets. The lower confidence you want, the narrower the CI gets The point estimate will be the same, just the margin of error value changes based on the confidence you want. The formula for the CI is your point estimate +/- E or margin of error. The "E" formula contains a value for the confidence and the higher the confidence, the larger the value hence the wider the spread. In talking about the width of the CI, it is not correct to say more or less precise. You would state something like I am 95% confident that the CI contains the true value of the mean.
Did less than 100 people survive the Titanic?
No, 706 people survived the disaster.
Can you be a police officer in the Navy?
The Navy equivalent of a police officer is called a "master at arms" or MAA. MAAs maintain security on naval ships and installations, and less frequently serve as a shore patrol in locations where naval personnel are stationed or have liberty (a day off from shipboard or regular duties). They also staff brigs (jails) on naval installations and on board ships. As with other military police, they do not retain their police powers when off duty.
How many people worldwide live on less than 1 dollar?
As of 2005, .88 percent of the world population lived on less than 1 dollar a day. More than 660 million people without any sanitation live on less than $2 a day, and more than 385 million people on less than $1 a day. There are about 1 billion people who live in poverty.
