or below the 8th grade level. In an early study the population proportion was estimated to be 0.21. How long how large a sample would be required in order to estimate the fraction of 10th graders reading at or below the 8th grade level at the 90% confidence level with an error of at most 0.03? Round your answer up to the next integer

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Solution: From the given information, confidence level is 0.80, p=0.18 and E=0.03.

Q: A federal report indicated that 22% of children ages 2 to 5 years had a good diet, an increase over…

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Q: A researcher found a 95% confidence interval for the proportion of college students who believe in…

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Q: You are interested in finding a 95% confidence interval for the mean number of visits for physical…

A: Given,mean(x¯)=13.6standard deviation (s)=9.1918sample size(n)=10degrees of…

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Answer: From the given data, Estimated population proportion (p) = 0.23 Margin of error (E) = 0.04…

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Population proportion p=0.23 Margin of error =E =0.06

Q: This is the last practice problem I have on my mid-term sheet. Ty for helping me!   Find the size…

A:

Q: find the margin of error of a 99% confidence interval for the mean score of all student

A: It is given that  Sample mean = 93 Sample standard deviation, s = 7 Sample size, n = 30

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A:

Q: You take a random sample of size 25 students and find the 5 who understand this lecture. With 99%…

A:

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: p = 0.23E = 0.03Confidence 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: magine that you conduct a study and estimate that the prevalence of hypertension among employees of…

A: It is given that the estimated prevalence is 24%.

Q: Remember the formula for the 80% confidence interval of a single proportion(see picture) : what is…

A:

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

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Q: Emma wants to estimate the percentage of people who use public transportation in a city. She surveys…

A: Obtain the margin of error. The margin of error is obtained below: The formula for the margin of…

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. In an…

A: population proportion(p)=0.27Margin of error(E)=0.03confidence level=98%

Q: A recent study indicated that 24% of women over 55 are widows. A researcher wishes to estimate with…

A:

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: It is given that margin of error (E) is 0.02 and the confidence level is 0.90.

Q: How many people should be surveyed to construct a 95% confidence interval with error = 3% to…

A: Given that Margin of error, E = 0.03 Population proportion, p = 0.15 Level of confidence = 95%

Q: You would like to construct a 99% confidence interval to estimate the population mean score on a…

A: Solution: Let X be the score. From the given information, x-bar=485 and S=70. Here, it needed to…

Q: A national survey of 1000 adult citizens of a nation found that 18% dreaded Valentine's Day. The…

A: Solution: Given information: n= 1000 Sample size  p^= 0.18  Sample proportion of adult of citizens…

Q: A researcher wanted to estimate the proportion of undergraduate college students (18– 29 years) with…

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Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: population proportion(p)=0.15confidence level=85%Margin of error(E)=0.03

Q: A research survey is commissioned to estimate the proportion of UK people who have traveled to…

A: Obtain the large sample size at 95% confidence level.   The large sample size is obtained below as…

Q: Find the sample size required to estimate the percentage of statistics students who take their…

A:

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Given,   Margin error = 0.02 Population proportion = 0.16   The objective is to find the sample…

Q: you take a sample in equal 25 of test scores from a population. The sample mean is 38, and the…

A:

Q: Find the margin of error at a 80% confidence level for estimating the population mean if n = 31, 2 =…

A: According to given question, We have :- Sample size n= 31Sample standard deviation s  =  5Sample…

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. In an…

A:

Q: How many Biology students’ records need to be sampled to estimate the percentage who earn "A"s to…

A: The proportion is not provided therefore in worst case it can be assume as (p) 0.5. Margin of error…

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Given , Population proportion , p = 0.22Margin of error , E = 0.03Confidence level , C = 90% =…

Q: Find the margin of error at a 80% confidence level for estimating the population mean if n = 15, x =…

A: Given: Sample size n = 15 Sample mean X = 44 Sample standard deviation s = 10 Confidence level = 80%…

Q: Assume that a sample is being used to estimate a population mean . If n = 16, = 38, and s = 3, find…

A: Sample size n=16Sample mean=38Standard deviation=3

Q: Find the margin of error at a 80% confidence level for estimating the population mean if n = 16, =…

A: It is given that  n = 16 s = 10 x̄ = 32