Identify the issue under investigation, the population, and the sample in the following scenario. Then determine whether or not this sample is likely to be representative of the population.

1a) The Sierra College Campus Parking and Security Services Department wanted to know the percentage of Sierra College students who use the parking lots on the Rocklin campus that feel there is not enough parking spaces on campus.

In order to address their concern, members of the department took positions within parking lots B, C, D, and E on Monday morning from 7:30 am till 8:00 am and asked every 5th student who parked their vehicle in those lots the following question "Do you feel that there is enough parking spaces on campus?".

1b) Identify the method of sampling used to collect the data in the following scenario.

A list of the all-time worldwide top box office grossing movies was obtained using the Internet Movie Database (www.imdb.com) website. At the time the sample was collected, the movies listed were ranked from 1 to 481. Only movies that have grossed over $200,000,000 worldwide at the box office during their theatrical runs were included in the list. The random number generator function randInt(1,481) on the TI-84 calculator was used to randomly select a number from 1 to 481. The movie on the list with the rank corresponding to the randomly selected number was included in the sample. This process was repeated until 60 movies were selected.

1c) Identify the method of sampling used to collect the data in the following scenario.

University Hospital conducted a study in order to describe the age (in weeks) at which infants learn to crawl. Consent forms collected from the parents of all the children born at the hospital last year who agreed to participate in future research projects were separated by the gender of the child. A random sample of 12 girls and a random sample of 12 boys were selected from the available consent forms. The parents of the randomly selected children were contacted, and the age at which their child learned to crawl was confirmed.

1d) Identify the method of sampling used to collect the data in the following scenario.

A nutritionist working for the United States Department of Agriculture (USDA) randomly selected three cartons of eggs from all of the available cartons of standard large eggs at a neighborhood grocery store. Each egg in the randomly selected cartons had their nutritional content analyzed. The nutritionist will use these results to verify the amount printed on the label of milligrams of cholesterol contained in a standard large egg.