Posted by **Anonymous** on Thursday, May 9, 2013 at 1:16pm.

1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population.

2. A study of 50 pizza delivery workers found that they could make 6 deliveries per hour with a standard deviation of 1. Find the 95% confidence interval of the mean for all pizza delivery workers.

3. A random sample showed that the average number of tv's in each household is 2.3 with a standard deviation of .4. Find the 90% confidence level for the average number of tv's in every household in the population.

4. A researcher revealed that the average number of people who have a driver's license out of a sample of 100 people is 1.5 with a standard deviation of .3. Find the 80% confidence interval for the mean of the population.

## Answer this Question

## Related Questions

- probs & stats - 1. A study of 40 people found that they could do on the ...
- Statistics - 1. A study of 40 people found that they could do on the average15 ...
- statistics - 1.A magazine reported that 6% of Americans read the news paper ...
- Statistics - Which of the following statements correctly interprets a 95% ...
- stats - The president of a large university wishes to estimate the average age ...
- Statistics - The standard deviation for a population is σ = 15.3. A sample ...
- statistics - An IQ test was administered to a random sample of 26 mental ...
- statistics - A specific study found that the average number of doctor visits per...
- statistics - A basketball scout randomly selected 144 players and timed how long...
- statistics - A simple random sample of 60 items resulted in a sample mean of 80...

More Related Questions