The HR manager of a water-bottling company wants to estimate the proportion of employees that are pleased with the cleanliness of the bathrooms. She considers two methods of obtaining a sample of 550 employees from the 3,500 employees at the company. Part A: To make the process easier, the manager considers surveying the first 550 employees who enter a company's annual conference center. Identify the type of sampling method proposed and discuss why this sampling method might be biased. (5 points)

Part B: The second method the HR manager is contemplating involves using a random number generator app to choose a simple random sample of 550 employees from a list of 3,500 employee names. How could she implement this method? (5 points)

Step-by-step explanation:

Part A: This is an example of "convenience sampling".  It is biased because not everyone has an equal probability of being selected.

Part B: The manager could generate 4 digit numbers between 1 and 3500, each number representing an employee.  Running 550 trials will generate the sample.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.