On a Greensboro (PTI) to Atlanta flight, 7% of the 900 passengers were selected for random security screening before boarding. According to the TSA, 10% of passengers at PTI are chosen for random screening. a. Identify the following and use  appropriate notation if necessary. Parameter: Sample: Statistic:  Population:

Define the following statistical terms:  Population: Sample: Median: Mode:

Select the scenario below that demonstrates sampling bias. Select the correct answer below: Justin wants to estimate the ethnic background distribution of residents of his town. He collects data from 1000 randomly selected town residents by using a random number generator. To estimate the mean salary of professors at her university, Patricia collects data by recording the salaries of all professors included in 12 randomly selected departments. Elizabeth wants to estimate the mean height of students at her school. She collects data by selecting a random group of students within her classroom. To estimate the mean grade point average of students at her school, Annie collects data by recording the grade point average of every 25th student on the list of students after a randomly selected first student.

Results from the 2015 IPEDS Report indicate that about 1 out of 25 students at Mohawk Valley Community College identify themselves as being of Asian descent.  Which of the following choices is the best estimate for the percentage of students at MVCC who identify themselves as of Asian descent?     0.4%     2.5%     0.04%     4%     25%     0.25%

Identify BOTH the populationand the samplefor thesituation below.A survey of 21pharmacists from Philadelphiafound that 87% of them are vaccinated

Consider the following data: 2, 10, 14, 12, 4, 4, 10 Step 1 of 3: Calculate the value of the sample variance. Round your answer to one decimal place.

The city council of Pine Bluffs is considering Increasing the number of police in an effort to reduce crime. Before making a final decision, the council asked the chief of police to survey other citles of similar size to determine the relationship between the number of police and the number of crimes reported. The chief gathered the following sample Information. Number of Number of City Oxford city Holgate Police Crimes Police Crimes 15 17 17 7 starksville Danville 17 13 Carey whistler 12 21 25 5 11 19 Athens 27 7 Woodville 22 6 Click here for the Excel Data File a. Determine the regression equation. (Round your answers to 4 decimal places. Negative value should be Indicated by a mlnus sign.) b. Estimate the number of crimes for a city with 20 police officers. (Round your answer to the nearest whole number.) Number of crimes c. Interpret the regression equation. For each policeman added, the number of crimes goes by approximately one.

Income Tax and the IRS. In 2010, the Internal Revenue Service (IRS) sampled 308,946 tax returns to obtain estimates of various parameters. Data were published in Statistics of Income, Individual Income Tax Returns. According to that document, the mean income tax per return for the returns sampled was $11,266. a. Explain the meaning of sampling error in this context.b. If, in reality, the population mean income tax per return in 2010 was $11,354, how much sampling error was made in estimating that parameter by the sample mean of $11,266?c. If the IRS had sampled 400,000 returns instead of 308,946, would the sampling error necessarily have been smaller? Explain your answer.d. In future surveys, how can the IRS increase the likelihood of small sampling error?

Fund the mean and variance for the following sample data 12, 16, 11, 23, 9, 17, 12, 25

Determine what the key terms refer to in the following survey. To determine the average number of classes Oxnard College students were taking, a group of 26 Oxnard College students answered the following question: How many classes you are taking this semester? Link the following terms to the appropriate statement. | Sample | Population Statistic Parameter a. The average number of classes of all students in Oxnard College is 2.9 b. The 26 Oxnard College students who were surveyed c. The average number of classes of those 26 students in the sample is 2.3 d. All students in Oxnard College