Find three statistical studies and explain whether they used descriptive or inferential statistics.

Early studies of the genetic code revealed it to be triplet in nature and to be nonoverlapping, commaless, and degenerate.

What limits the application of GFP for general studies of microbial activity and distribution in the environment?

The manager of a high school cafeteria is planning to offer several new types of food for student lunches in the following school year. She wants to know if each type of food will be equally popular so she can start ordering supplies and making other plans. To find out, she selects a random sample of 100 students and asks them, "Which type of food do you prefer: Asian food, Mexican food, pizza, or hamburgers?" Here are her data:

$$\scriptstyle\begin{array}{lcccc} \hline \text { Type of Food: } & \text { Asian } & \text { Mexican } & \text { Pizza } & \text { Hamburgers } \\ \text { Count: } & 18 & 22 & 39 & 21 \\ \hline \end{array}$$

An appropriate null hypothesis to test whether the food choices are equally popular is (a) $H_{0}: \mu=25,$ where $\mu$ = the mean number of students that prefer each type of food. (b) $H_{0}: p=0.25,$ where p = the proportion of all students who prefer Asian food. (c) $H_{0}: n_{A}=n_{M}=n_{P}=n_{H}=25,$ where $n_{A}$ is the number of students in the school who would choose Asian food, and so on. (d) $H_{0}: p_{A}=p_{M}=p_{P}=p_{H}=0.25,$ where $p_{A}$ is the proportion of students in the school who would choose Asian food, and so on. (e) $H_{0}: \hat{p}_{A}=\hat{p}_{M}=\hat{p}_{P}=\hat{p}_{H}=0.25,$ where $\hat{p}_{A}$ is the proportion of students in the sample who chose Asian food, and so on.

Why are studies of twins important for determining whether a disorder has a biological basis?

Identify the independent variable(s) and the dependent variable for each of the studies in the mentioned exercise.

List some of the characteristics that make bacteriophages ideal organisms for many types of genetic studies.

What do you think are the most compelling reasons for and against conducting studies of twins?

What are the two subfields of economics? Explain what each subfield studies .

What can be learned about nature and nurture from twin studies?

Describe how lesioning studies and brain stimulation are used to study the brain.

Which of the following characteristics is found in typical Asian hair? a) dark medulla b) sparsely distributed pigment granules c) flattened cross section d) hair is curly

Do you believe it is ethical or unethical to deceive people about the purposes of research studies?

Have a conversation with three members of Asian Americans subcultures and get to know their opinions of how their ethnic or nationality group is portrayed on network television shows and in national ads.