# Statistics

posted by .

Computer Depot is a large store that sells and repairs computers. A random sample of 110 computer repair jobs took technicians an average of 93.2 minutes per computer. Assume that o is known to be 16.9 minutes. Find a 99% confidence interval for the population mean u for the computer repairs. Interpret the interval in the context of this problem. State what assumptions were met to use the method you selected.

• Statistics -

For raw score, use SD, but for means, use Standard Error of the mean (SEm).

99% = mean Â± 2.585 SEm

SEm = SD/√n

## Similar Questions

1. ### computer

I am interested in computer so i wanted to ask that what is computer engineer?
2. ### math

seven students each stent 15 minutes at the classroom computer. an eighth studentworked 18 minutes. what is the tolal computer time in minutes and hours

A computer repair shop charges a flate rate of 50\$ plus \$35 per hour spent repairing each computer. LEt h be the number of hours spent repairing a computer. Use function notation to write an equation that gives the total charges for …
4. ### statistics

c. The arrival of large jobs at a computer centre forms a Poisson process with rate 2 per hour. The service time of such jobs are exponentially distributed with mean 20 minutes. Only 4 large jobs can be accommodated in the system at …
5. ### Statistics

The time it takes a technician to fix a computer problem is exponentially distributed with a mean of 15 minutes. what is the probability that a). it will take a technician less than 10 minutes to fix a computer problem?

The Bureau of Labor Statisticsâ€™ American Time Use Survey showed that the amount of time spent using a computer for leisure varied greatly by age. Individuals age 75 and over averaged 0.30 hour (18 minutes) per day using a computer …
7. ### Statistics

The repair cost for a certain model of laptop computer has a normal distribution with a mean of \$100, and with a standard deviation of \$25. If 16 ovens are sent for repairs, find the probability that the average cost of repairs will …
8. ### Math

A sales associate at a computer store receives a bonus of \$100 for every computer he sells. He wants to make \$2500 in bonuses next month. Write and solve an inequality to find the minimum number of computers he must sell.
9. ### Technology in the classroom

What is the ideal computer arrangement to use when you want to integrate computers directly into the classroom curriculum?
10. ### math

An Apple Computer Center sells computers for \$1,192.80. Assuming the computers cost \$10,080 per dozen. a. Find the dollar markup for each computer. (Round your answer to the nearest cent.) Dollar markup \$ b. Find the percent markup …

More Similar Questions