A. Direction: In cach of the following examples, identify the sampling method being used.1. A sample of 2,000 was sought to estimate the average achievement in science of fifthgraders in a city's public schools. The average fifth grade enrollment in the city'selementary schools is 100 students. Thus, 20 schools were randomly selected andwithin each of those schools all fifth graders were tested.

Answered: Image /qna-images/answer/a26dd8e4-0b90-4f3e-ab87-d496aa8568af.jpg

Answered: A. Direction: In cach of the following…

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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If the sample size is decreased, then the sampling error will - a. not change b. Increase c. inrease or decrease d. Decrease
A gym manager is interested in whether the ‘beginner’ and ‘expert’ climbing walls (that were of the same height) at her facility are actually different from each other. To test this, she decides to look at the time it takes people to reach the top of both walls. She recruits 25 students and has them each climb both walls and looks for differences between the ‘beginner’ wall climbing times and the ‘expert’ wall climbing times. Select one: a. single sample t-test b. one-way ANOVA c. paired samples t-test d. z-test e. factorial ANOVA f. t-test independent means
#3 Identify the sampling technique used. To ensure customer satisfaction, every 15th phone call received by customer service will be monitored. O A. convenience O B. cluster OC. random O D. systematic O E. stratified Type here to search F5 %23 2. 8 5. E R 4. 6. A 1. SS F. G.
For each of the following experiments, describe the sample space. i) Flip a coin four times ii) Flip a coin and roll a die. ii) Observe the proportion of people with blue eyes in a group of 40 people.
Sample surveys on sensitive issues can give different results depending on how the question is asked. A University of Wisconsin study randomly divided 2400 respondents into three groups. All participants were asked if they had ever used cocaine. One group of 800 was interviewed by phone; 21% said they had used cocaine. Another 800 people were asked the question in a one-on-one personal interview; 25% said “Yes.” The remaining 800 were allowed to make an anonymous written response; 28% said “Yes.”101. Was this an experiment or an observational study? Justify your answer.2. Make a two-way table of responses about cocaine use by how the survey was administered.3. Are the differences between the three groups statistically significant? Give appropriate evidence to support your answer
The number of hours spent per week on household chores by all adults has a mean of 28.1 hours and a standard deviation of 6.0 hours. The probability, rounded to four decimal places, that the mean number of hours spent per week on household chores by a sample of 53 adults will be more than 26.75 is:
Please answer questions D and E for me
Problem: Which single sampling plan should be used for a lot size of 5000, an LTPD of 5% with a consumer's risk (¤) of 0.10, and process average as 0.6% defective? er
According to the Census Bureau, the distribution by ethnic background of the New York City population in a recent year was Hispanic: 28% Black: 24% White: 35% Asian: 12% Others: 1% The manager of a large housing complex in the city wonders whether the distribution by race of the complex’s residents is consistent with the population distribution. To find out, she records data from random sample of 800 residents. The table below displays the sample data. Race Hispanic Black White Asian Others Count 212 202 270 94 22 Are these data significantly different from the city’s distribution by race? Carry out an appropriate test at the ? = 0.05 level of significance to support your answer. State the null and alternate hypotheses (write it mathematically) and write your claim. Find the test statistics. Identify the Rejection region (critical region) and fail to reject region. Show this by drawing a curve and separate the rejection region from the fail to reject region using the critical…
At a Stanford University,37%of students support green party.suppose a sample of size 94 students and are interested inthe population proportion of students who support that party.find the sampling distribution of sample proportion?

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