Suppose we want to determine the proportion p of all Canadians who agree with the statement: “Prime Minister Justin Trudeau has handled the COVID-19 crisis well.” We would like to estimate p to within a margin of error E = 1% = 0.01, at the 95% confidence level, and we make no prior assumptions about the value p. What is the minimum sample size which achieves this margin of error?

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A: GivenMargin of error(E)=1.5variance(σ2)=225standard deviation(σ)=225=15confidence level=95%

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A: Givenstandard deviation(σ)=4Margin of error(E)=0.5confidence interval=90%

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A: It is given that Margin of error E = 0.03 Level of confidence = 0.95 The critical value of Z at 95%…

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A: formula for the sample size :

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Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: Given data isn=332x=36p^=xn=36332=0.108434Margin og error(E)=0.04Confidence level=95%

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A: Note: Hey there! Thank you for the question. As you have posted multiple questions, we have helped…

Q: 17. A researcher surveys 50 individuals in Smithville and 40 in Amherst, finding that 30% of…

A: Here we will use 2-tail test for Hypothesis testing. Given Values : Sample 1:n1 = 50p1 = 0.3Sample…

Q: Find the minimum sample size you should use to assure that your estimate of p will be within a…

A: We have to find sample size required.

Q: (iii) How large would the sample size need to be so that the margin of error for your 95% confidence…

A: Given: Sample size, n = 9           Sample mean, m = 94.619           SAmple variance, s2 = 49.0001…

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Q: Find the critical values x-1-a/2 and x¯a/2 for a 90% confidence level and a sample size of n = 10.

A: The sample size is,n=10 The degree of freedom is, df=n-1   =10-1   =9 The level of significance is,

Q: 13. How large a sample should be selected so that the maximum error of estimate for a 95% confidence…

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A: Given data, n=331 x=33 E=0.05 z-value at 95% confidence is Zc=1.960 n=?   p=x/n=33/331=0.0997

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Q: This can be computed by adding and subtracting a margin of error to the point estimate.

A: The margin of error is obtained by multiplying the critical value and standard error value.

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A: (a)compute sample size ( n ) = n=(Z/E)^2*p*(1-p) Z a/2 at 0.1 level of significance is = 1.645sample…

Q: 1. Find the minimum sample size (n) you use to so that p is within a margin of error of 3% with a…

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Q: 6. A hospital wants to estimate the proportion of patients who needed a second visit with a 95%…

A: Here use formula of Margin of error for finding n sample size

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Q: 12.10. Question attached. Thank you for answering my question!

A: Bonferrroni's formula for half-width is given by the formula shown below where I = number of means…

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Q: 9. Find the minimum sample size needed to be within a margin of error of 2% of the population…

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Q: Suppose x has a mound-shaped distribution witho = 3. Find the minimal sample size required so that…

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Q: How large a sample should she take to achieve this? Please carry answers to at least six decimal…

A: Given: sample size, n=332 number of people have flu, x=36 Margin of error, E=0.03 confidence…

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A: The margin of error is 0.026.

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A: Zα/2 = 1.645  at α = 0.1 _____________________________ Use Excel function =NORMSINV(0.05) OR Z-…

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A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.