Your medical professor asks you to collect data from a lab samples to find out the percentage of these samples with chemical Ethyl acetate present. The Professor doesn't tell you anything else about estimates obtained last year not influence the results. You have access to a total of 2,525 samples and you need to determine how many need to be checked to be within three percent of the true percentage value using a ninety seven percent confidence interval.

Q: during production of detergent. In people with no lung dysfunction, a typical air flow rate is 0.80.…

A: As the population standard devoation is known, we will use z distribution. The value of z at the…

Q: Out of a sample of 600 adults aged 18 to 30, 162 still lived with their parents. Based on this,…

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Q: A survey found that 73% of a random sample of 8344 American adults approved of cloning endangering…

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Q: In 2016 the CDC wanted to estimate the proportion of adults who are smokers in the U.S. The…

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Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 400…

A: The objective of this question is to construct a 95% confidence interval for the proportion of adult…

Q: Two separate samples receive two different treatments. The first treatment group (N = 15) has a mean…

A: n1=15, x¯1=50, SS1=210n2=9, x¯2=56, SS2=190

Q: Many high school students take the AP tests in different subject areas. In one year, of the 144,140…

A: given data  n1 = 144140   x1 = 84545p^1 = x1n1 = 84545144140 = 0.5865 n2 = 216298    x2 = 126501p^2…

Q: Data from the National Health Interview Survey (NHIS): Group Sample Size Health Status Std. Error…

A: There are 2 categories of the people who have visited hospital recently and other doesn't visited…

Q: A survey of 1,000 adults showed 58% believed the driving age should be changed from 16 years of age…

A: Provided information: Number of adults in a survey = 1000 58% believed the driving age should be…

Q: There are many reasons adults use credit cards. A recent survey found that 66% of adults used credit…

A: 66% of adults use credit cards for convenience.Confidence level is 99% i.e., 0.99.Margin of error is…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

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Q: We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 500…

A: The sample proportion of the sample of size n can be defined as:  Here, X = Total number of success…

Q: Find the 95% confidence interval for the proportion of customers planning to buy the shoes, and…

A: Provided data is, Mary was successful and collected 600 responses in time. 195 of the surveyed…

Q: Kiyo is confused. He has constructed a 90% confidence interval for the average age of students at…

A: Answer: Given that:     Kiyo is confused. He has constructed a 90% confidence interval for the…

Q: You want to know about the difference in the percentage of men who get sick when exposed to H1N1 and…

A: Given data: For men: n1 = 150      x1 = 20 For Women: n2 = 200       x2 = 15 Confidence level = 95%…

Q: A federal report indicated that 17% of children under age 6 live in poverty in Nevada, an increase…

A: Given data, p=17%=0.17 E=2%=0.02 z-value at 99% confidence is Zc=2.576 n=?

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 400…

A: Solution: It is given here:

Q: According to a report on consumer fraud and identity theft, Indiana had 1671 complaints of identity…

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Q: If n=27, (x-bar)=34, and s=3, find the margin of error at a 90% confidence leve Give your answer to…

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Q: You plan to conduct a survey to find out the proportion of students who enjoy taking classes…

A: Given  The margin of error is given as m=0.02 At a 90% confidence interval, α=0.1 As the proportion…

Q: A study at Harvard found that 44% of their students binge drink. You are at Princeton doing a…

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Q: What is the impact of changing from the 95% confidence interval to the 90% confidence interval? The…

A: Confidence Interval Confidence Interval refers to the range of the value that we expect our estimate…

Q: I know how to do the first part, I am curious how to get the 95% confidence interval on part 6.

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Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

A: Obtain the 95% confidence interval for the true proportion of adult residents who are parents in…

Q: You are constructing a 99% confidence interval for the proportion of all caterpillars that…

A: Given information- Sample size, n = 396 We have given that out of 396 randomly selected caterpillars…

Q: you used the percentage of alcohol to predict wine quality. The data are stored in Vinho Verde. For…

A: a. To construct a 95% confidence interval estimate of the mean wine quality rating for all wines…

Q: You want to get a 95% confidence interval for the difference between the percentage of females with…

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Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 100…

A: According to the given information, we have Out of 100 adult residents sampled, 88 had kids. 99%…

Q: All other things being equal, would a 95% confidence interval be smaller or larger than a 90%…

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Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

A: Solution

Q: Your medical professor asks you to collect data from lab samples to find out the percentage of these…

A:

Q: lution is incorrect since the  confidence level is 90% margin of error is 3%

A: Given: Confidence level = 0.90 Margin of error (E) = 0.03 Assumed sample proportion  p^     = 0.50

Q: In 2009, 33% of Americans felt that one parent should stay home to raise the children instead of…

A: Given,n=1015x=416p^=xnp^=4161015=0.4099α=1-0.99=0.01α=0.01

Q: Create a 95% confidence interval for the percent of people who shop on Amazon, using the Plus 4…

A: Given: ∝ = 0.05 n = 50 x = 47 Thus, p^= x/n = 47/50 = 0.94

Q: The police department wants to reduce the margin of error for their 95% confidence interval. If they…

A: Here Given  The police department wants to reduce the margin of error for their 95% confidence…

Q: 3. A researcher suspects that the actual prevalence of generalızed anxiety amony adolescents is…

A: Denote p as the true proportion of the prevalence of generalized anxiety among children and…

Q: If n=25, z-46, and s=5, construct a confidence interval at a 95% confidence level. Assume the data…

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Q: The proportion of junior executives leaving large manufacturing companies within three years is to…

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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.