The amounts of time employees of a telecommunications company have worked for the company are normally distributed with a mean o
1 answer:
Answer:
a) 5.6 years
b) 0.4478
Step-by-step explanation:
We are given the following in the question:
Mean, μ = 5.6 years
Standard Deviation, σ = 1.9 years
Sample size, n = 18
We are given that the distribution of amounts of time is a bell shaped distribution that is a normal distribution.
a) Mean of each sample.
The best estimator of the sample mean is the population mean itself. Thus, we have:
Thus, the sample mean is 5.6 years.
b) Standard error
Formula:
Putting values, we have.
Thus, the standard error is 0.4478.
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This is given by the curve:
See figure 1.
2. Cubic function.
This function is given by:
see figure 2
3. Quartic function
This curve is given by:
see figure 3
4. Cosine function
This function is given by this equation:
See figure 4.
All these curves are open shapes. So, we can find a new open shape as the sum of all these curves as follows:
See figure 5.
1. Parable
This is given by the curve:
See figure 1.
2. Cubic function.
This function is given by:
see figure 2
3. Quartic function
This curve is given by:
see figure 3
4. Cosine function
This function is given by this equation:
See figure 4.
All these curves are open shapes. So, we can find a new open shape as the sum of all these curves as follows:
See figure 5.