A survey is conducted on the use of Facebook of adults in the United States, where 12,000 adults are surveyed and 9,450 adults answered that they did use Facebook. What is the Population?

Identify whether the following data set is a population or a sample. A study about the age of runners is being conducted on the contestants in a marathon of over 200 runners. The researcher collects data only from the first 15 runners and last 15 runners to finish the marathon.

A major university decides to survey the student body to find out their opinion about campus life. All students are grouped by their majors. The university randomly chooses four students from each major to sample, classify the sample.

Which of the following is most likely to be a random sample?

A newspaper is doing some research on the effects of the additional funding schools in Georgia are receiving due to sales of lottery tickets. To be efficient the newspaper decides to only research all of the schools in Bartow, Clayton, and Gwinnett Counties.

Which type of sampling method is being employed in the following example: "A huge line has formed at the Apple store. The customers are waiting to purchase the new iPhone 7. A new reporter decides to ask every 5th person why they prefer iPhones over Android based phones."

Which would be considered Qualitative data?

Which would be considered Quantitative data?

The list of movies that will open this Friday is considered what kind of data?

Which method of data collection is used if you collect data for a study about the effects of a certain drug given to 10 patients and a placebo given to another group of 10 patients to determine if the drug is effective?

Which method of data collection would you use to gather data for a study to determine the effect of forest fires on wildlife habitats?

You want to know if a chiropractor or an acupuncture treatment actually improves blood pressure. Which method of data collection should you use?

In a study of the opinions of all 18-25 year old adults in the United States, which of the following would be the best unbiased sample?

In a study about adult health in Gwinnett County, which method of data collection would have the least amount of bias?

A researcher believes different types of music increase mental ability. So, the researcher has groups of participants complete a few puzzles. She times the group and grades their performance. Then, waits an hour and has them complete similar puzzles and again records their time and performance. She experiments by playing different types of music during the second testing to see if their improvement is more significant with certain types of music. How would you describe the type of music she plays?

A researcher believes that spending more on advertisement will increase business in his shop at the mall. So, each month he increases the amount he spends on advertising and monitors how many customers visit his store. In the month of December, he isn’t sure if the increase is due to the advertising or the holiday shopping. How would you describe the change in amount of money spent on advertising?

How would you most correctly describe Group ‘A’ in a statistical study?

A person is studying a new headache medicine that has been deemed safe for human trials. The researcher offers the new medicine to people suffering from headaches at several local hospitals. The researcher has decided to use a blind study and form 2 sample groups. He gives patients in Group ‘A’ the actual real experimental medicine. He gives patients in Group ‘B’ a fake treatment that is nothing more than a sugar pill that looks like the real medicine. How would you describe Group ‘A’?

Which type of study best describes the following research most likely to be done? A researcher is testing new weight loss supplements. The researcher decides to sample two groups. The first group of subjects, the researcher labeled group ‘A’. The researcher plans to give a placebo that looks like the real medicine but is just a sugar pill to Group ‘A’. The second group, group ‘B’, will be given the real medicine. The researcher knows which participants got the placebo and which received treatment but the participants don’t know.

Which type of study best describes the following research most likely to be done? A researcher is testing new medicine to treat headaches. The researcher is provided with bottles labeled with an ID number. In half the bottles there is placebo that is practically indistinguishable from the real medicine and the other half the bottles contain the actual medicine. It is not revealed to the participants or the researcher until the end of the study which bottles contained the real treatment and which contained the placebo.

The scores of the top ten finishers in a recent race are listed below. 65 66 66 67 67 67 68 70 70 71 Find the mean score

Which measure of center is best to use when you have an outlier?

Which student has a higher median tip for the week and by how much?

Consider the following unorganized data set: 12, 15, 8, 29, 30, 27, 19, 12 What is the third quartile (Q3) of the data set?

The mean of a data set is 30. What is the deviation from the mean of a data point 27 that was part of the data set?

Consider the data set: 60, 44, 56, 52, 48 Data Points (x) | Mean (x̄) | Deviation 60 | 52 | 8 44 | 52 | -8 56 | 52 | 4 52 | 52 | 0 48 | 52 | -4 What is the mean absolute deviation of the data set (use the table for help)?

Which of the following dot plots would most likely have the highest standard deviation?

What is the standard deviation for the following data set? 2 7 9 13 14

In the set of data below, what value represents the first quartile, Q1?

Use the Box-and-Whisker Plot to identify the first quartile, Q1.

Use the Box-and-Whisker Plot to identify the median.

Use the Box-and-Whisker Plot to identify the interquartile range.

Consider the two line plots: Data Set A and Data Set B. Which statement below is true?

Which data set graphed below would most likely consider the MEDIAN as the best measure of central tendency measure (just based on the data points)?

Consider the following Data Set shown in the line plot below. If every data point were to be multiplied by 2 to form a new data set, what would the line plot look like for the new data set?

In the following data set, what would be considered the outlier? 1 12 14 13 11 15 17 12 19 24

Which is the best definition of an Outlier?

Which ordered data set below could this histogram represent?

Consider the following histogram: Which frequency table best represents the same information as the histogram?

Consider the following histogram which a student created to show the heights of males in his classroom: What would be the mean height of the males in the student's classroom?

This histogram shows the frequency distribution of duration times for 107 consecutive eruptions of the Old Faithful geyser. The duration of an eruption is the length of time, in minutes, from the beginning of the spewing of water until it stops. What is the BEST description for the distribution?

Which histogram below shows a data set that is skewed right?

Which histogram has the most amount of variation?

Two competing news stations, FIX News and NNC are trying to determine if the democratic or republican candidate is predicted to win the upcoming election in a small county. They both used a valid random sampling of the voting population. FIX News used a sample size of 50 and NNC use a sample size of 100. Which news station is more likely to have a more accurate prediction?

Edward’s Car Guide and Kadie’s Blue Book are two websites that provide car reviews on current model SUV’s sold in the U.S. At Edward’s Car Guide they randomly sampled 24 new gasoline SUV’s for this year and found that the average miles per gallon (mpg) for SUV’s was 27 mpg. At Kadie’s Blue Book they randomly sampled 42 new gasoline SUV’s for this year and found that the average miles per gallon (mpg) for SUV’s was 29 mpg. Which sample statistic of average mpg is more likely to be a better representation of the population parameter?

A voter polling research group determined that 41% of the voters in a county would vote for the democratic candidate with a ±4% margin of error. If they anticipate only 12,000 people will turn out to vote in this election, which would represent the possible number of voters for the democratic candidate.

A survey estimated that the average cost of textbooks for a semester of college is $320 with a margin of error of ± 8%. What is the range of the possible average cost of text books?

Researchers report that the average teen (age 13-17) sends 1742 ± 112 text messages per month. Which of the following is the best interpretation of this information?

The graph at the right show the frequency distribution of a population with a population mean of 2.5 and a population standard deviation of 3. If samples of size 36 (n = 36) were taken from the population what would be the mean of the sample means (μx̄)?

The graph at the right show the frequency distribution of a population with a population mean of 2.5 and a population standard deviation of 3. If samples of size 36 (n = 36) were taken from the population what would be the standard deviation of the sample means (σx̄)?

The graph at the right shows the frequency distribution of a population with a population mean of 2.5 and a population standard deviation of 3. If samples of size 36 (n = 36) were taken from the population, which graph would most likely be a good representation of the distribution of the sample means?

When writing a set of hypotheses for a situation, which of the following is true?

A researcher believes that students who practice taking all of their regular tests on the computer will do better on the State's final exam which is on the computer than the students taking their regular tests by paper and pencil. Which would be the null hypothesis?

From 1990 to 2000 the average temperature in July in Dallas was 97° F. A researcher believes due to Global Warming that the average temperature is increasing in Dallas. Which of the below could be the alternative Hypothesis?

SuperCaff Cola conducted a survey to gauge the effectiveness of their advertising. The researchers estimated from the survey that between 27% and 37% of the target population remember the ads. What was the margin of error for this research?

The average debt owed by college graduates after they graduate is between $$24,000 and$$ 34,000. How could this be written using a margin of error?

The average distance commuters in the metro Atlanta area have to drive every day to work is between 12 miles and 28 miles. How could this be written using a margin of error?