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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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
Identify what sampling technique is applicable in the following situation:Your organization is conducting a random drug testing in schools. As a member of the research committee, you are tasked to conduct the test in Central City School which has a population of 9672 students. The sample that you need is only 100 randomly selected students. How are you going to achieve this? Show solutions if necessary.
A researcher wants to study the effects of social media on Grade 11 students in Mathematics High School. He wishes to use the simple random sampling technique in choosing the members of his sample. If there are 1,000 Grade 11 students in the school, how many students should there be in his sample? Discuss the steps he must take if he wishes to use the lottery method.
2
Suppose you recruit the next 100 people who visit the DCC cafeteria to participate in a survey. One of the questions you ask is whether the student eats on campus (i.e., in the cafeteria) regularly, and you want to use the sample proportion to estimate the value of the (population) proportion of all DCC students who eat on campus regularly. Do you think this sampling method is likely to be biased? If so, in which direction? This sampling method is not likely to be biased and will produce a representative sample of DCC students. This sampling method is biased and is likely to yield an overestimate for the population proportion. This sampling method is biased and is likely to yield an underestimate for the population proportion.
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.
Your medical research team is investigating the standard deviation of the cost of a 30-day supply of a certain heart medication. A pharmaceutical company thinks that the standard deviation of the cost is less than $24. You want to support this claim. How would you write the null and alternative hypotheses? Ho: 224 H₂:0<24
Determine which Sample Type is used in the following scenarios. President Biden want to survey the nation about their incomes. He contacts the IRS and has them put everyone who filed taxes last year into a data base. He then groups tax filers based on their filing status, Single, Married filing separate, and married filing jointly. He then selects 5000 people from each group using a random generator to survey.
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 Scenario Sampling Method Researchers want to survey K-12 students about their socialization skills during the COVID pandemic. Researchers start by recruiting a small sample of 20 students, and then ask each of these 20 students to refer the researchers to 5 more potential participants. Researchers keep asking new participants to refer them to 5 more people

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