STa2023 - Pearson hw chap 1/2

Many online retailers keep data on products that customers​ buy, and even products they look at. What do online retailers hope to gain from such​ information? A. Revenue from selling a​ customer's data back to the customer B. Revenue from selling the data to marketing companies Your answer is correct. C. Guidance in pricing and offers to help maximize profit Your answer is correct. D. Guidance in designs and placement of links to personalize the Web site experience

B. Revenue from selling the data to marketing companies Your answer is correct. C. Guidance in pricing and offers to help maximize profit Your answer is correct. D. Guidance in designs and placement of links to personalize the Web site experience

Facebook uploads more than 350 million photos every day onto its servers. For this​ collection, describe the Who and the What. Choose the correct answer below. A. The Who is the​ servers; the What is the number of photos on each server. B. The Who is the​ photos; the What could be the facts about the photos. C. The Who is​ Facebook; the What is the photos. D. The Who is the Facebook​ users; the What is total number of users.

B. The Who is the​ photos; the What could be the facts about the photos.

Sports announcers love to quote statistics. During the Super​ Bowl, they particularly love to announce when a record has been broken. They might have a list of all Super Bowl​ games, along with the scores of each​ team, total scores for the two​ teams, margin of​ victory, passing yards for the​ quarterbacks, and many more bits of information. Identify the Who in this list. A. The quarterbacks B. The Individual games C. The sports announcers D. The two teams

B. The Individual games

The website www.nobelprize.org allows you to look up all the Nobel prizes awarded in any year. The data are not listed in a table. Rather you drag a slider to the year and see a list of the awardees for that year. Describe the Who in this scenario. Choose the correct answer below. A. The categories in which the Nobel prizes are awarded B. The organization that awards the Nobel prizes C. The people who have been awarded a Nobel prize from the organization D. The years in which the Nobel prizes are awarded E. The ages of people who have been awarded a Nobel prize from the organization

C. The people who have been awarded a Nobel prize from the organization

June 2011 Gallup Poll asked​ Americans, "Thinking about the job situation in America​ today, would you say that it is now a good time or a bad time to find a quality​ jobs?" The choices were​ "Good time" or​ "Bad time." What kind of variable is the​ response? Choose the correct answer below. A. This response variable would be classified as a quantitative variable because the variable options are numbers that act as numerical values. B. This response variable would be classified as a categorical variable because the variable options are numbers that act as numerical values. C. This response variable would be classified as a categorical variable because the variable options use words and not numeric values. D. This response variable would be classified as a quantitative variable because the variable options use words and not numeric values.

C. This response variable would be classified as a categorical variable because the variable options use words and not numeric values.

A poll question​ asked, "In politics, as of today, do you consider yourself liberal, moderate, or conservative?" The possible responses were "Liberal," "Moderate," "Conservative," "Other," and "No Response." What kind of variable is the​ response? What is the variable​ type? Identifier Categorical variable Ordinal Quantitative variable

Categorical variable

A poll question​ asked, "In the next 5 years, do you think that things will get better, get worse, or stay the same?" The possible responses were "Better," "Worse," "No change," "Don't Know," and "No Response." What kind of variable is the​ response? Quantitative variable Categorical variable Your answer is correct. Ordinal Identifier

Categorical variable

A medical researcher measures the increase in heart rate of patients who are taking a stress test. What kind of variable is the researcher​ studying? Choose the correct answer below. Identifier variable Quantitative variable Ordinal variable Categorical variable

Quantitative variable

A pharmaceutical company conducts an experiment in which a subject takes 100 mg of a substance orally. The researchers measure how many seconds it takes for half of the substance to exit the bloodstream. What kind of variable is the company​ studying? What is the variable​ type? Categorical variable Identifier Ordinal Quantitative variable

Quantitative variable

The table to the right gives the number of passenger car occupants killed in accidents in a certain year by car type. Convert the table to a relative frequency table. Table: Subcompact and Mini - 1738 compact - 4772 intermediate - 4851 full - 2568 unknown - 271 complete table below car type - relative frequency subcompact and mini - % compact - % intermediate - % full - % unknown- %

subcompact and mini - 12.24% compact - 33.61% intermediate - 34.16% full - 18.08% unknown- 1.91%