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L15.2082 - Statistics for Business and Economics (2024/2025)
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Researchers conducted an online survey with a random sample of 2,000 workers from a nationwide government database. They found that people who worked remotely reported higher job satisfaction than those working in the office. We can conclude that:
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A study is conducted to estimate the average commute time of office workers in a major city. Researchers randomly survey 500 office workers and ask how long their commute takes. The key parameter of interest most likely is:
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Consider the frequency table below displaying the number of parking tickets that a random sample of 138 individuals got in the last month.
| 0 | 80 |
| 1 | 43 |
| 2 | 15 |
Knowing that the sample mean is 0.529, what is the mean absolute deviation? Present you result with two decimal values.
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A business analyst is computing the mean salary of employees in their company to summarize employee compensation. This is a:
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A business analyst calculated the variance of daily sales for a retail store as 625. How should this value be interpreted?
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A sports analyst records the points scored by 15 basketball players. The adjusted sample variance is 64. What is the unadjusted sample variance?
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