Posted by **ME** on Saturday, November 17, 2012 at 9:18pm.

The average amount of time people spend on facebook each day is 71 minutes, with a standard deviation of 4.7 minutes. Are you more likely to select a random person that spends less than 68 minutes per day, or a group of 35 people that spend on average less than 65 minutes per day on facebook? Assume this is normally distributed. Find the chances of each to decide which is more likely, and by how much. Show all work.

B. How many minutes would a person have to be on facebook to be considered the top 5%? Round appropriately to the nearest minute. If you come out with a number like 100.2 minutes, you would have to round up to 101 because 100 would not quite be in the top 5%

- statistics -
**PsyDAG**, Sunday, November 18, 2012 at 1:02pm
For one person:

Z = (score-mean)/SD

For 35 people"

Z = (score-mean)/SEm

SEm = SD/√n

In both cases, find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.

B. Use same table to find .05 in the smaller area. Use Z value in first equation to find the score.

## Answer This Question

## Related Questions

- Statistics - The average amount of time people spend on facebook each day is 71 ...
- Statistics - The average time a visitor spends at the Renzie Park Art Exhibit is...
- Algebra 2 - A simple random sample of 50 adults was surveyed, and it was found ...
- statistics - Bill spends an average of 5 minutes each day waiting in lines. If ...
- Dine - Men spend an average of 29 minutes per day on weekends and holidays ...
- math - Tia generated a list of random numbers to simulate an experiment based on...
- Statistics - A recent study of US children under 11 years old found that they ...
- Math - My daughter's homework and I cant figure it out for the life of me. In ...
- statistic - The amount of time a bank teller spends with each customer has a ...
- Statistic - The amount of time it takes to take your order at the local Whaters ...

More Related Questions