Mathematics, 04.12.2020 05:00 montgomerykarloxc24x

Sheer industries is considering a new computer-assisted program to train maintenance employees to do machine repairs. In order to fully evaluate the program, the director of manufacturing requested an estimate of the population mean time required for maintenance employees to complete the computer assisted training. Use 7.94 days as a planning value for the population standard deviation.

Answers: 1

Show answers

Answers

Answer from: tadeebun

The question is missing parts. Here is the complete question.

Sheer Industries is considering a new computer-assisted program to train maintenance employees to do machine repairs. In order to fully evaluate the program, the director ofmanufacturing requested an estimateof the population mean time required for maintenance employees to complete the computer assisted training. Use 7.94 days as a planning value for the population standard deviation. (Round your answers up to the nearest whole number).

(a) Assuming 95% confidence, what sample size would be required to obtain a margin of error of 0.5 days?

(b) If precision statement was made with 90% confidence, what sample size would be required to obtain a margin of error of 3 days?

(a) n = 900

(b) n = 18

Step-by-step explanation: Margin of Error represents the percentage of confidence your result will be different from the real population value.

It is calculated as

$E=z\frac{\sigma}{\sqrt{n}}$

z is z-score related to the percentage of confidence

σ is population standard deviation

n is sample size

(a) Margin of error = 0.5

For a 95% confidence, z-score is 1.96.

Sample size will be:

$E=z\frac{\sigma}{\sqrt{n}}$

$\sqrt{n}=\frac{z\sigma}{E}$

$\sqrt{n}=\frac{1.96*7.64}{0.5}$

$\sqrt{n} =30$

n = 900

For a 95% confidence, margin of error of 0.5 days, sample size required would be 900.

(b) Margin of error = 3

z-score for 90% confidence = 1.645

Solving for sample size:

$\sqrt{n}=\frac{z\sigma}{E}$

$\sqrt{n}=\frac{1.645*7.64}{3}$

$\sqrt{n}=4.2$

n = 18

It would be required, to obtain a margin of error of 3 days, a sample size of 18 maintenance employees.

Answer from: Quest

i don't know, but that looks pretty bad. my school passed us unless we failed in all the subjects, but idk abt ur school's rules.

Idont need but will i pass sixth grade with these grades answer

Answer from: Quest

seven students earned $833 by shoveling snow. if they share the money equally, how much money will each student get

answer: each student earns $119

step-by-step explanation:

to find the answer you have to divide 833/7 which is 119

Another question on Mathematics

Mathematics, 21.06.2019 16:00

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Answers: 3

Answer

Mathematics, 21.06.2019 18:40

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Answers: 1

Answer

Mathematics, 21.06.2019 20:00

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily

Answers: 2

Answer

Mathematics, 21.06.2019 21:00

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.

Answers: 1

Answer

You know the right answer?

Sheer industries is considering a new computer-assisted program to train maintenance employees to do...

Questions