A researcher wishes to create a study to estimate the true proportion of university studentswho do their laundry once a week. If the researcher wishes to be 90% confident her estimate is within4% of the true proportion, how large would the sample need to be?a) 17b) 106c) 422d) 423

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Answered: A researcher wishes to create a study…

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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The Canadian Chiropodists Society states that 36 % of women wear shoes that are too small for their feet. A researcher wants to be 98 % confident that this proportion is within 0.02 of the true proportion. How large a sample is necessary? A.) 5,423 B.) 3,117 C.) 1,745 D.) 4,270
The lengths (in kilometers) of a random sample of 20 rivers on the South Island of New Zealand that flow to the Tasman Sea are listed in table below. Lengths of Rivers (in km) 177 56 76 68 56 For the data shown above, find the following. Do not round any of your answers. The program here will take either answer. a) Find the 5-number summary: b) Compute the IQR. c) What is the lower fence for this data set? |} What units would go on each of your answers above? What is the upper fence for this data set? 32 40 72 37 108 64 56 51 64 32 35 72 48 80 64
From the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No". Group of answer choices: A) the proportions of the sampled Americans who go on more than two vacations per year B) the proportion of all Americans who go on more than two vacations per year C) the 1,420 people who responded "No" D) the 2,000 Americans
7) Estimate the proportion of all households that are very satisfied from the house they are living (question 16 of the survey).
a programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than three percentage points? Complete parts (a) through (c) below. a) Assume that nothing is known about the percentage of computers with new operating systems. n = b) Assume that a recent survey suggests that about 98% of computers use a new operating system.n = c) Does the additional survey information from part (b) have much of an effect on the sample size that is required?
The distribution of hemoglobin in grams per deciliter of blood if approximately N(14,1) in women and approximately N(16,1) in men. Use software or Table B to find the answers. A) What percent of women have more hemoglobin than the men's mean hemoglobin? B) What percent of men have less hemoglobin than the women's mean hemoglobin? C) What percent of men have more hemoglobin than the women's mean hemoglobin?
In a recent survey of 157 WMU graduates, 117 students said that parking was too limited on campus. What is the estimate of the population proportion? What is the standard error of this estimate? Question 7 options: 1) Estimate of proportion: 0.745, Standard error: 0.0348. 2) Estimate of proportion: 0.255, Standard error: 0.0028. 3) Estimate of proportion: 0.745, Standard error: 0.0028. 4) The true population proportion is needed to calculate this. 5) Estimate of proportion: 0.255, Standard error: 0.0348.
From the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No". Group of answer choices: A) the proportions of the sampled Americans who go on more than two vacations per year B) the proportion of all Americans who go on more than two vacations per year C) the 1,420 people who responded "No" D) the 2,000 Americans
Social media is becoming more and more popular around the world. Suppose a website provides estimates of the number of social media users in various countries. Assume that the results for surveys in the United Kingdom, China, Russia, and the United States are as follows. Use Social Media Yes No United Kingdom 480 320 Country China Russia 235 265 343 Need Help? 357 O Ho: All population proportions are not equal. H₂: P₁ = P₂ = P3 = P4 Read It OHO: Not all population proportions are equal. Ha: P₁ = P₂ = P3 = P4 (a) Conduct a hypothesis test to determine whether the proportion of adults using social media is equal for all four countries. State the null and alternative hypotheses. O Ho: P₁ = P₂ = P3 = P4 H₂: Not all population proportions are equal. United States 620 380 Ho: P₁ = P₂ = P3 = P4 H: All population proportions are not equal. Find the value of the test statistic. (Round your answer to two decimal places.) What is the p-value? (Round your answer to four decimal places.) p-value =…
the Seeb International School. The difference between estimates and population parameters is known as: O a. formula error O b. enumeration error O c. sampling error С. O d. human error Next page

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A researcher wishes to create a study to estimate the true proportion of university students who do their laundry once a week. If the researcher wishes to be 90% confident her estimate is within 4% of the true proportion, how large would the sample need to be? a) 17 b) 106 c) 422 d) 423