You are evaluating year-end bonus trends at two potential employers. Companies X and Y have an average bonus of $\text{(}5,000$ with standard deviations of $\text{)}800$ and $\text{(}500$, respectively.

If you aim to receive a bonus of $\text{)}6,000$ or higher, at which company is that outcome more likely? Support your answer with statistical reasoning.

A wildlife biologist measures the time between sightings of a rare bird. In a sample of $n=120$ sightings, the mean time between sightings is $45.5$ minutes, with a standard deviation of $12.5$ minutes. Using Chebyshev's Theorem, at least how many of the times were between $20.5$ minutes and $70.5$ minutes?

The following are sample test scores out of $100$ for two different classes. Calculate the coefficient of variation for each class and determine which class has more relative variation.

Class A: $72$, $75$, $78$, $80$, $85$

Class B: $68$, $70$, $75$, $80$, $87$

Given the data set $2$, $4$, $7$, $9$, and $11$, calculate the mean absolute deviation.

The sample standard deviation for this data is approximately $3.56$. How does the mean absolute deviation compare? Use the formula $\text{MAD}=\frac{\Sigma \mid x-\bar{x}\mid }{n}$.

For a normally distributed test score with mean 80, using the empirical rule, what approximate percentage of students score between 70 and 86 if the standard deviation is 4?