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Question
The following data shows the yearly income distribution of a sample of 200 employees at MNM, Inc.| Yearly Income ($1000s) | Number of Employees |
| 20 - 24 | 2 |
| 25 - 29 | 48 |
| 30 - 34 | 60 |
| 35 - 39 | 80 |
| 40 - 44 | 10 |
a. What percentage of employees has yearly incomes of more than $35,000?
b. Is the figure (percentage) that you computed in Part a an example of statistical inference? If no, what kind of statistics does it represent?
c. Based on this sample, the president of the company said that "45% of all our employees' yearly incomes are over $35,000." The president's statement represents what kind of statistics?
d. With the statement made in Part c, can we be assured that more than 45% of all employees' yearly incomes are at least $35,000? Explain.
e. What percentage of employees of the sample has yearly incomes of $29,000 or less?
f. How many variables are presented in the above data set?
g. The above data set represents the results of how many observations?
Answer
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