Exposure to Background Television. CNN reports that young children in the United States are exposed to an average of 4 hours of background television per day. Having the television on in the background while children are doing other activities may have adverse consequences on a child's well-being. You have a research hypothesis that children from low-income families are exposed to more than 4 hours of daily background television. In order to test this hypothesis, you have collected a random sample of 60 children from low-income families and found that these children were exposed to a sample mean of $4.5$ hours of daily background television.

a. Develop hypotheses that can be used to test your research hypothesis.

List some problems or opportunities in your community. Focus for a moment on the one you care about most. Could two or three courses of action solve this problem? Write a report to your city official recommending a course of action. Research your courses of action using the library or other resources.

Given sentence below refers to a numbered sentence in the passage. Write the letter of the choice that gives the sentence a meaning that is closest to the original sentence.
_________ In an interesting twist recent research indicates that some black bears are becoming obese as they develop the __________ habits of humans.
a. lazy
b. active
c. drinking
d. sleeping

Some biologists research the structure of animals. Biologists have discovered that the length l of an antelope's bone, measured in millimetres can be modeled by $l=24.1 d^{2 / 3}$. where d denotes the bone's midshaft diameter (in millimeters). What is the length of an antelope bone if the midshaft diameter is 20 millimetres?

Brand Licensing Use publications, such as Brandweek, AdWeek, BusinessWeek, and entertainment and sports publications, or online research to investigate brand licensing arrangements in the sports or entertainment fields. Identify the name of your source(s) and prepare a one-page report that summarizes the arrangement, the parties and companies involved, and length of the licensing agreement.

Suppose that the present success rate in the treatment of a particular psychiatric disorder for the relevant population is known to be .65 (65%). A research group hopes to demonstrate that the success rate of a new treatment will be better than this standard. Use the letter p to represent the success rate of the new treatment. Write null and alternative hypotheses for p.

State the researchers’ hypothesis, and identify the independent and dependent variables in this study. Explain why the researchers used four mating combinations for each pair of populations.

Write the letter of the correct answer on the line at the left. _What is the main reason that embryonic stem cell research is considered ethically controversial? A. Embryos contain totipotent cells. B. Embryos are the result of sexual reproduction. C. Embryos from many different organisms must be used. D. Embryos are destroyed in the process.

Research an endangered or threatened species in your state. Gather information on its population for several years. Make a scatter plot using the data you gather. Is there a positive or negative correlation? Explain. Draw a trend line and make a prediction about the species population over the next 5 years.

Select the best answer. Corn variety 1 yielded 140 bushels per acre last year at a research farm. This year, corn variety 2, planted in the same location, yielded only 110 bushels per acre. Based on these results, is it reasonable to conclude that corn variety 1 is more productive than corn variety 2? (a) Yes, because 140 bushels per acre is greater than 110 bushels per acre. (b) Yes, because the study was done at a research farm. (c) No, because there may be other differences between the two years besides the corn variety. (d) No, because there was no use of a placebo in the experiment. (e) No, because the experiment wasn't double-blind.

Making and Using Tables Research at least ten hurricanes that have occurred throughout the world since 1980. Based on the Saffir-Simpson scale, make a data table showing wind speed, air pressure in the center, and property damage associated with each hurricane. For more help, refer to the Skill Handbook.

What personality traits do psychologists possess? Choose two psychologists discussed in this chapter and conduct Internet research to find biographical information about each one. Then, using either Han's Eysenck's dimensions of personality or the Five-Factor Model, come up with a set of trait words for each psychologist.

Work with your group to research and complete each activity. For your three planets, list the ordered pairs representing (time, distance). Graph each set of ordered pairs on a coordinate plane and connect each set of points with a line. Compare the graphs. Then write equations to represent each relationship.

You and a friend are each typing your research papers on computers. The function y = 1400 - 50x models the number y of words you have left to type after x minutes. For your friend, y = 1200 - 50x models the number y of words left to type after x minutes. Who will finish first? Explain.