(a) The organizers of a conference want to survey attendees about the registration fee. Which of the following best describes a cluster sample ofattendees?The organizers select the first 90 attendees who register for the conference because these attendees are easily accessible.The organizers form groups of 30 attendees based on the day the attendees registered. Then, the organizers randomly choose 3 groups andselect all of the attendees in these groups.The organizers take a list of the attendees and select every 5" attendee until 90 attendees are selected.(b) Counselors at a college want to poll students about how much time the students spend studying. Which of the following best describes a stratifiedsample of students?The counselors form 6 groups of students based on the numbers of classes the students are taking. Then, the counselors select 13 students atrandom from each group.The students living in a particular dorm building on campus are easily accessible. So, the counselors select the 78 students living in thatparticular dorm building.The counselors form groups of 13 students based on the students' majors. Then, the counselors select all of the students in 6 randomly chosengroups.(c) A facilities supervisor at a sports stadium wants to rate the condition of the seats at the stadium. Which of the following best describes a systematicsample of seats?The supervisor uses a computer program to draw 50 seats at random and selects these seats. Every set of 50 seats is equally likely to be drawnby the computer program.The supervisor forms 2 groups of seats based on the dates the seats were last replaced. Then, she selects 25 seats at random from each group.thThe supervisor takes a list of the seats and selects every 5" seat until 50 seats are selected.

here use definition of different sampling method

Answered: a) The organizers of a conference want…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Adela Noriegam, a researcher wants to determine how employee salaries at a certain company are related to the length of employment, previous experience, and education. The researcher selects eight employees from the company and obtains the following data: Employee Salary,y Employment (in yrs), x1 Employment (in yrs), x2 Employment (in yrs), x3 A 57310 10 2 16 B 57380 5 6 16 C 54135 4 1 12 D 56985 6 5 14 E 58715 8 8 16 F 60000 20 0 12 G 59400 9 4 18 H 60720 15 7 17 What is the regression equation? Leave your answer in 2 decimal places Y = ()+() +() +
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Of 1,050 randomly selected adults, 360 identified themselves as manual laborers, 280 identified themselves as non-manual wage earners, 250 identified themselves as midlevel managers, and 160 identified themselves as executives. In the survey, 82% of manual laborers preferred trucks, 62% of non-manual wage earners preferred trucks, 54% of mid-level managers preferred trucks, and 26% of executives preferred trucks. Which distribution should you use for this problem?
1. Make a questionnaire with one question (using Google form) for a sample size of 30 students to collect the data on their weights (kg). Take screenshot for the survey then answer the following: a. Construct a frequency distribution table of 4 classes for the collecting data and find the relative frequency. b. Find the median for the grouped data.
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1. Suppose we want to sample a neighborhood for a community needs assessment. The neighborhood has 7 subdivisions and 3 of the 7 are to be collected for household sampling. How many different ways can we select these households? ·
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1. A researcher wishes to determine if the following distances (in meters) traveled by a random sample of ten world-class long jumpers are highly affected by the speed (in meters per second) at takeoff. The distances recorded from the sample long jumpers are as follows: 7.67, 8.22, 7.94, 7.16, 8.08, 7.35, 7.89, 7.76, 7.25, and 7.43. On the other hand, the speeds are recorded as follows: 8.9, 9.2, 8.1, 8.6, 9.0, 8.4, 8.8, 9.1, 8.0, and 8.2. What will be the distance, assuming that the speed is 9.4 meters per second? Round your answer to two decimal places. There is no need to place the unit. 2. A certain regression line equation has the slope equal to 720.25 and an intercept that is equal to -182.4. What will be the predicted score for the dependent variable if the independent variable is 281.5? Round your answers to two decimal places. Do not place any unit.
The racial/ethnic diversity of post high school students enrolled at MVCC during the fall 2020 semester is given below. Racial/Ethnic Diversity of Post High School Students Race/Ethnicity Percent* American Indian or Alaska Native 0.4% Asian 5.3% Black or African American 9.6% Hispanic or Latino 9.6% Two or more races 2.8% Native Hawaiian or Pacific Islander <0.1% Non-Resident Alien 0.5% Unknown 1.5% White 70.2% (*Percentages may not total 100 due to rounding) Is race/ethnicity a qualitative or quantitative variable Is the data displayed in a frequency or relative frequency distribution?

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a) The organizers of a conference want to survey attendees about the registration fee. Which of the following best describes a cluster sample of attendees?