A sociologist studying freshmen at a major university carried out a survey, asking, among other questions, how oftenstudents went out per week, how many hours they studied per day, and how many hours they slept at night. The sociologistused an introductory sociology class to carry out the survey and asked only the freshmen to answer the questions. Thesample is called:a volunteer sample.a random sample.a targeted sample.a convenience sample.

In the survey carried out by the sociologist studying freshmen at a major university, some questions…

Answered: A sociologist studying freshmen at a…

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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Identify the kind of sample that is described. An electronics store polls 300 customers who bought computers at the store within the past two years about high-speed Internet rates. The sample consisted of 150 randomly selected Mac users and 150 randomly selecțed PC users. The sample is a (Choose one) v sample. convenience simple random cluster voluntary response stratified systematic
In a city, according to a 1990 demographic report based on the census result, the average daily spending onfood per person is $75.In 2020, a random sample of 28 persons in the same city is selected and the daily spending ($) on food foreach interviewee is recorded as follow:55.0 59.5 62.5 65.5 68.5 69.0 70.0 70.0 82.0 82.583.5 85.0 86.0 86.5 86.5 87.0 87.0 87.0 89.0 92.593.0 94.5 94.5 96.0 98.0 102.5 108.5 110.5(a) Find the point estimate for the population mean daily spending on food per person in year 2020.(b) It is assumed that the spending is normally distributed. Construct a 90% confidence interval estimatefor the population mean daily spending on food per person in year 2020.(c) Is there sufficient evidence to conclude that the population mean daily spending on food per person in2020 is higher than 1990? Test at 1% level of significance. (State clearly the null hypothesis,alternatively hypothesis, rejection region, test statistics and conclusion.)
The students in an Introductory Statistics class are asked to complete a survey about study habits. (a) does the study appear to use random sampling? yes or no (b) does the study appear to use random assignment? yes or no
A small shop owner wants to see how much people are spending at her store, so she numbers all the receipts from the past week and uses a computer program to generate a list of 20 random numbers. She samples the receipts that correspond to those numbers. What type of sample was taken? convenience sample simple random sample systematic sample cluster sample quota sample voluntary response sample
A community college employs 8787 full-time faculty members. To gain the faculty's opinions about an upcoming building project, the college president wishes to obtain a simple random sample that will consist of 99 faculty members. He numbers the faculty from 1 to 8787. Complete parts (a) and (b) below. LOADING... Click the icon to view the random number table. Question content area bottom Part 1 (a) Using the provided random number table, the president closes his eyes and drops his ink pen on the table. It points to the digit in row 3, column 6. Using this position as the starting point and proceeding downward, determine the numbers for the 99 faculty members who will be included in the sample. The numbers for the faculty members are enter your response here.
A Statistics Canada researcher selects (at random) 10 apartments in one apartment building. The researcher then interviews all the residents in each of the 10 apartments selected. Which type of sampling did this researcher use?
Multiple Choice Question A study took a random sample of adults and asked them about their bedtime habits. The data showed that people who drank a cup of tea before bedtime were more likely to go to sleep earlier than those who didn't drink tea. What was the population being studied? A. All adults that drink tea before bed B. All Adults C. All People D. All adults that don't drink tea
The set of all possible values of a sample statistic is called a A. simple random sample. B. point estimate. C. census. D. sampling distribution.

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