Posted by **Anonymous** on Monday, September 24, 2007 at 12:16pm.

I was given a table that showed a simple random sample of adults' age and annual income living in suburb of a large city.

a) What is the probability that a person chosen at random from those in this sample will be the 31-45 age category? The answer I got is .43 or 43%.

b) What is the probability that a person chosen at random from those in this sample whose incomes are over $50,000 will be in the 31-45 age category? I found this to be .365, or 36.5%.

c) Bsed on your answers in parts a and b, is annual income independeent of age category for those in this sample? Explain. How do I prove this? I don't know what to do for this part.

- math -
**bobpursley**, Monday, September 24, 2007 at 12:27pm
It is not possible to critique answers a or b because the table is not here.

On c, again we need the table.

- math -
**Anonymous**, Monday, September 24, 2007 at 12:34pm
Here is the table:

Annual income

Age 25K-35K 35,001-50K Over 50K

21-30 8 15 27

31-45 22 32 35

46-60 12 14 27

Over 60 5 3 7

## Answer this Question

## Related Questions

- statistic****help***** - Show all your work. Indicate clearly the methods you ...
- STATISTIC***HELP - Show all your work. Indicate clearly the methods you use ...
- statistics - Assume that we collect a large (n>30) simple random sample of ...
- statistics - A nationwide study indicated that 27% of adults said that chocolate...
- Statistics - In a certain city of several million people, of the adults are ...
- math - In a population of 10,000 adults, 20% are smokers. A simple random sample...
- statistics - A random sample of 80 youths and a second random sample of 120 ...
- mathmath - A study conducted by the Metro Housing Agency in a midwestern city ...
- Statistics - According to one survey, the mean serum cholesterol level for U.S. ...
- Statistics - Daily water intake (including water used in drinks such as coffee...

More Related Questions