Posted by **cindy** on Wednesday, March 31, 2010 at 1:26pm.

A random sample of 40 men drank an average of 20 cups of coffee per week during examination final,

with the population standard deviation equal to 6 cups. A lower limit of an approximate 95% confidence

interval the population average cup of coffee is

(1) 20.000

(2) 21.859

(3) 19.708

(4) 18.141

(5) 19.051

I calculated the answer as no4?

- stats -
**Diamond**, Saturday, November 15, 2014 at 4:22pm
Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean.

A group of 64 randomly selected students have a mean score of 38.6 with a standard 9) deviation of 4.9 on a placement test. What is the 90% confidence interval for the mean score, μ, of all students taking the test?

## Answer this Question

## Related Questions

- Stats - A random sample of 30 women drank an average of 15 cups of coffee per ...
- STATS - 12- The number of cars sold annually by used car salespeople is normally...
- statistics - A survey of college students was conducted during final exam week ...
- Statistics: Percentile Rank - A survey of college students was conducted during ...
- Statistiscs - Students in the psychology department consume an average of 5 cups...
- STATS - 1-Suppose that the fuel comsumption of cars for the same model is ...
- biostatistics - among coffee drinkers, men drink a mean of 3.2 cups per day with...
- statistics - Among coffee drinkers, men drink a mean of 2.8 cups per day with a ...
- Statistics - 1) For each of the following statements, formulate appropriate null...
- Statistics - The international Coffee Association has reported the mean daily ...

More Related Questions