1.38 City council survey. A city council has requested a household survey be conducted in a suburbanarea of their city. The area is broken into many distinct and unique neighborhoods, some including largehomes, some with only apartments, and others a diverse mixture of housing structures. For each part below,identify the sampling methods described, and describe the statistical pros and cons of the method in thecity's context.(a) Randomly sample 200 households from the city.(b) Divide the city into 20 neighborhoods, and sample 10 households from each neighborhood.(c) Divide the city into 20 neighborhoods, randomly sample 3 neighborhoods, and then sample all householdsfrom those 3 neighborhoods.(d) Divide the city into 20 neighborhoods, randomly sample 8 neighborhoods, and then randomly sample50 households from those neighborhoods.(e) Sample the 200 households closest to the city council offices.DOD000 F41F57tvMacBook AirF6*▶11S NAA CF8F9NF10

The objective of the question is to identify the sampling methods used in each scenario and discuss…

Answered: 1.38 City council survey. A city…

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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20 computer screens were randomly selected from a large collection of computer screens in a company’s warehouse. These 20 computer screens are referred to as the: test statistic. parameter. population. sample.
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.)
A child has an enormous jar in which she has been saving all of her spare change. In order to determine exactly how much money she has in the jar, she dumps all of the coins on the floor and counts them. Under the watchful eye of her mother, she counts 180 pennies, 120 nickels, 100 dimes, and 80 quarters. The data collection method used in this example is called Select one: a. none of these b. random sampling. C. a controlled study. d. e. a census. a survey.
A company is started by four friends. The company was Erica’s idea, so she wants to fill 70% of the orders. Jen, Heather, and Tonya each agree to fill 10% of the orders. After a successful first year, Erica wants to determine if the distribution of the number of orders filled is adhering to the agreed-upon percentages. To do so, she selects a random sample of 100 orders from the large number of orders that were filled and determines who filled the order. What is the name of the appropriate inference procedure? chi-square test for goodness of fit one-sample t-test for a difference in means two-sample t-test for a difference in means two-sample z-test for a difference in proportions
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Answer Task A only
Part 1: Sampling Methods Identify the sampling method in the following scenarios. Based on the sampling method, is the research likely to have high or low external validity? High or Low External Validity Sampling Scenario Method Researchers at PCC are interested in knowing about academic success of PCC students. They compile a list of all students' emails and use a random number generator to select a sample of 4000 students to survey.
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