A sample of 120 employees of a company is selected, and the average age is found to be 37 years.

After inspecting all of 55,000 kg of meat stored at the Wurst Sausage Company, it was found that 45,000 kg of the meat was spoiled.

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. The temperatures of eight different plastic spheres.

Salaries of college professors.

Temperatures of the ocean at various depths.

Identify the sample and population. Also, determine whether the sample is likely to be representative of the population. 100,000 randomly selected adults were asked whether they drink at least 48 oz of water each day and only 45% said yes. Answer: Sample: the 100,000 selected adults; population: all adults; representative

Is the study experimental or observational? A marketing firm does a survey to find out how many people use a product. Of the one hundred people contacted, fifteen said they use the product.

A sample of fish is taken from a lake to measure the effect of pollution from a nearby factory on the fish.

A stock analyst compares the relationship between stock prices and earnings per share to help him select a stock for investment.

Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. 49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively.

A sample consists of every 49th student from a group of 496 students.

A market researcher selects 500 people from each of 10 cities.

Identify the number as either continuous or discrete. The number of freshmen entering college in a certain year is 621.

The number of limbs on a 2-year-old oak tree is 21.

The number of stories in a Manhattan building is 22.