In our industry on average a firm paid out record year end bonuses of $125,500 per employee for 2008. we would like to take a sample of employees at our firm to see whether the mean year end bonus is different from the reported mean of $125,500 for the population. we sample 40 of our employees and we had a mean of $118,000. assume a population standard deviation of $30,000. setup for the p-value and critical value approaches. we want to be 95% confident about our finding.

if the answer could be broken down on how they were solved, that would be great.

1. sample mean =
2. population mean = ?
3. population standard deviation = ?
4. sample size = ?
5. alpha error = ?
6. confidence coefficient = ?
7. calculate test statistic = ?
8. rejection region critical value = ?

Step-by-step explanation:

Given that in our industry on average a firm paid out record year end bonuses of $125,500 per employee for 2008. We would like to take a sample of employees at our firm to see whether the mean year end bonus is different from the reported mean of $125,500 for the population.

1. Sample Mean = 118000

2. Population Mean = 125500

3. Population Standard Deviation = 30000

4. Sample size = 40

5. Alpha Error = 5%

6. Confidence Coefficient = 95%

7. Calculate Test Statistic = Mean difference /s td error = -1.581

8. Rejection Region Critical Value = If Z statistic is below -1.96 or above 1.96

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.