Indentify the sampling method that was used.
In a medical research study, a researcher selects a hospital and interviews all the patients that day.

Making Calculations From 1970 to 2005 , nitrogen-oxide, $\mathrm{NO}_x$, emissions in the United States decreased from about $26.9$ million to about $19.0$ million tons per year. By what percentage did $\mathrm{NO}_{\mathrm{x}}$ emissions decrease over these years?

Describe a suitable sampling method for this study and explain the reasoning behind your choice of method.

What is the marginal product of the coffee shop workers? How much does a coffee shop worker earn?

Determine the sampling method that was used.

15. For 15 minutes, all customers entering a selected Walmart store on a specific day are asked how many miles from the store they live.

Identify four properties of a substance that will never change. ______, ______, ______, ______.

Which is an example of gender role strain?

a. A man who experiences tension in his marriage because he is spending long hours at work.

b. A boy who is teased at school because he enjoys playing with dolls.

c. A woman who is passed over for promotions at work in favor of her less qualified male colleagues.

d. All of these.

A researcher measures the amount of sugar in several cans of the same soda. The mean is 39.01 with a standard deviation of 0.5. The researcher randomly selects a sample of 100. Find the sum with a z–score of 0.5.

Categorize the type of sampling (simple random, stratified, systematic, cluster, or convenience) used in the following situation. Subscribers to the magazine Sound Alive were assigned numbers. Then a sample of 30 subscribers was selected by using a random-number table. The subscribers in the sample were invited to rate new compact disc players for a "What the Subscribers Think" column.

Determine whether descriptive or inferential statistics were used.
A recent article stated that over $38$ million U.S. adults binge-drink alcohol.

A researcher divided subjects into two groups according to gender and then elected members from each group for her sample. Find the sampling method the researcher using?

a. Cluster

b. Random

c. Systematic

d. Stratified

The average January 2012 temperature in Boston was $34.2^{\circ} \mathrm{F}$. This was $5.2^{\circ}$ higher than the normal January average temperature, defining a population that may have been used and explaining how the sample might have been selected.

To determine how long people exercise, a researcher interviews 5 people selected from a yoga class, 5 people selected from a weight-lifting class, 5 people selected from an aerobics class, and 5 people from swimming classes, to identify the sampling method that was used.

Determine whether descriptive or inferential statistics were used.
Based on a sample of $2739$ respondents, it is estimated that pet owners spent a total of $14$ billion dollars on veterinarian care for their pets.