a) What is the formula you will need to use?b) Complete the calculationsc) What is your final sample size? Flossing helps prevent tooth decay and gum disease. Reportssuggest that millions of Americans never floss. You want toconduct a sample survey to determine what percent of studentsat your university never floss. You obtain permission to use theuniversity roster to contact a simple random sample (SRS) ofstudents. You want to estimate the proportion p of students whonever floss with 90% confidence and a margin of error nogreater than 3% (0.03). Assume that the proportion ofindividuals who never floss is 27%. How large a sample do youneed?

here given , confidence level = 90% margin of error < 0.03 p = proportion of individuals who…

Answered: greater than 3% (0.03). Assume that the…

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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Exercise Classification of arterial diastolic blood pressure (mm Hg) in adults, 18 years and older Diastolic blood pressure (mm Hg) Less than 85 85-89 90-104 105-114 Greater or equal to 115 Blood Pressure Classification Normal High normal Mild hypertension Moderate hypertension Severe hypertension Consider that blood pressure readings are obtained from nearly 200,000 participants in a a large-scale community blood pressure screening program, and that these measurements follow a normal distribution. The mean is 85 mm Hg, with a standard deviation of 13 mm Hg.
Administrators at Texas A&M University were interested in estimating the percentage of students who are the first in their family to go to college. The A&M student body has about 52,000 members. The A&M administration is considering a variety of ways to sample students for a survey. For each of these proposed survey designs, identify the problem. 60min a) Publish an advertisement inviting students to visit a website and answer questions. O A. This would be a convenience sample. O B. This would suffer from voluntary response bias. 60min OC. This would suffer from undercoverage. O D. This would suffer from nonresponse bias. b) Set up a table in the student union and ask students to stop and answer a survey. O A. This would be a convenience sample. O B. This would suffer from undercoverage. O C. This would suffer from voluntary response bias. O D. This would suffer from nonresponse bias.
Topic: sample size
You will be applying what you have learned in this course by gathering data and running a statistical analysis. 1) To study about the relationship between height and the weight, you need to collect a sample of nine (9) people using a systematic sampling method. a. What is the population of people? b.Where and how are you going to collect your sample? c. Does your sample accurately represent your population? Why or why not? d. Collect the sample and record the data. 2) (CLO 1) Construct a confidence interval to estimate the mean height and the mean weight by completing the following: a. Find the sample mean and the sample standard deviation of the height. b. Find the sample mean and the sample standard deviation of the weight. c. Construct and interpret a confidence interval to estimate the mean height. d. Construct and interpret a confidence interval to estimate the mean weight. 3) (CLO 2) Test a claim that the mean height of people you know is not equal to 64 inches using the…
PROPORTIONS Sample Size: Calculate the sample size. A previous study showed that 69% of community college students have read a book for personal enjoyment during the school year. If a new study were to be done in order to reduce the margin of error to 1%, how many students should be sampled?
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
As part of a sixth-grade class project the teacher brings to class a jar containing 200 gumballs of two different colors: red and green. Andy is asked to draw a sample of his own choosing and estimate the number of red gumballs in the jar. Andy draws a sample of 25 gumballs, of which 8 are red and 17 are green. Use Andy's sample to estimate the number of red gumballs in the jar. There are approximately Answer red gumballs in the jar.
60% of students entering four-year colleges receive a degree within six years. Is this percent smaller than for students who play intramural sports? 128 of the 220 students who played intramural sports received a degree within six years. What type of test should you use? A) z-test for population mean B) z-test for population proportion C) t-test for population mean
Determine the sample size associated with the following formula. Remember to always round up to the next highest whole number. ?=[(1.96)⋅(3.56)0.16]2n=[(1.96)⋅(3.56)0.16]2
374 is 22% of the sample size. Find n
Lisa's scores on tests for the assessment class are 93, 89, 87, and 83. She needs an 89.5 average to obtain an "A" in the class. Assuming that all tests, including the final, are equally weighted, what score must she obtain on the final exam to earn an "A"? CA Vimsi l
Please help me solve: A. the sample size B. Assume that based on studies, 14% of the region are left handed-construct a sample size

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greater than 3% (0.03). Assume that the proportion of individuals who never floss is 27%. How large a sample do you need?