A federal report indicated that 14% of children under age 6 live in poverty in New Jersey, an increase over previous years. How large a sample is needed to estimate the true proportion of children under age 6 living in poverty in New Jersey within 3% with 90% confidence? Round the intermediate calculations to three decimal places and round up your final answer to the next whole number.

Q: A company claims that 76% of its employees are satisfied with the work conditions. An independent…

A: Formula of test statistic : z = p^ - pp(1-p)n Where , p^ is sample proportion. p is hypothesized…

Q: Your professor wishes to estimate the proportion of high school students enrolled in college-level…

A: Given: margin of error of 3.5 percent 99% confidenp p= 18.3%

Q: ou want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: According to Chebyshev's Theorem, within how many standard deviations from the mean would you find…

A: From the provided information, Let within k standard deviations from the mean we find at least 47.5%…

Q: In a population of ages where the mean age is 45 and the standard deviation is 5.25, what are the…

A: Given mean age = 45Standard deviation = 5.25The Z score with 0.0505 to its left is -1.64 and the Z…

Q: you want to obtain a sample to estimate a population proportion. based on previous evidence, you…

A:

Q: Construct a 95 % prediction interval for the height of a particular son whose father is 67…

A:

Q: Will you provide an example of Standard Deviation math problem and solution?

A: Standard deviation:The standard deviation indicates by how much each observation differs from a…

Q: What percentage of variation in GPAs can be explained by students' SAT scores? Round your final…

A: Coefficient of determination is the square of the correlation coefficient  (r2) and it explains that…

Q: Imagine that the pregnancy test accurately indicates pregnancy in 97.5% of the people who have it.…

A: The miss rate will be 2.5%

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: In a random sample of 73 items produced by a machine, the quality control staff found 25 of them to…

A: Sample proportion is always a point estimate of population proportion

Q: A publisher reports that 22% of their readers own a laptop. A marketing executive wants to test the…

A: Denote p as the true proportion of readers, who own a laptop. It is reported that 22% of their…

Q: A newspaper infographic titled "Baby's First Photo Reveal" summarized data from a survey of 1,000…

A: Answer is given by confidence interval.

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: According to the provided information, Proportion is unknown. So, worse case proportion is 50%. p =…

Q: researcher wishes to estimate the proportion of the adult population of the U.S. has sleep…

A: E=0.03 99% confidence interval for z=2.576 p=0.5

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

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Q: in a recent year, a study found that 75% of adults ages 18–29 had internet access at home. A…

A: Solution: Let X be the number of undergraduates had internet access and n be the sample number of…

Q: Sometimes when you are sick, your forehead feels really warm. You might have fever. How can you find…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: what range of raw scores makes up the middle 40%

A: The middle 40% means, the scores lie between 30th and 70th percentile. From stand normal, z-score…

Q: Question Help ▼ st Ho: u= 50 versus H,: µ<50, a random sample of size n 22 is obtained from a…

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Q: In a recent year, a study found that 75% of adults ages 18–29 had internet access at home. A…

A: The following information has been provided: The population proportion is p=0.75 The sample size is…

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: What type of significance test would you run given the data above? What conditions must be satisfied…

A: Solution: 1)Here we will use 1 sample z test2)data must be from normal distnii sampe is independent…

Q: Which statistical measurement is used to measure minutes?  Is it ordinal, nominal or scaled?

A: Nominal: When the possible observations are tags or categories or names, without any natural…

Q: A hospital director is told that 55% of the emergency room visitors are insured. The director wants…

A: Given: n= 320 ,x= 160 p= 0.55 ,significance level(∝)= 0.01 p̂= 160 / 320 =0.5

Q: Estimate population proportion: New York Times poll found that 329 out of 763 adults said they would…

A: Given Information: n = 763 x =329 Confidence Interval = 88%

Q: Statistics Canada wants to know the unemployment rate in Vancouver during any part of last year. How…

A: confidence level=90% Margin of error(E)=0.012

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

A:

Q: (a) Find a point estimate for the proportion of cell phone owners aged 18-24 who have an Androld…

A: It is given that Sample size n = 245 Number of cell phone owners with Android phone, X = 106

Q: A group of students need to submit a project and they need to survey people about their daily…

A: see the handwritten solution

Q: Suppose a government department would like to investigate the relationship between the cost of…

A: The data shows the a random sample of 10 homes heating cost and square footage.

Q: C2. GSS 2014 and GSS 2018 respondents were asked their opinion on whether homosexuals should have…

A: Given information: GSS 2014 and GSS 2018 respondents were asked their opinion on whether…

Q: In a study about children's pocket money, two samples of schoolchildren were asked how much money…

A: Combined mean=n1x1+n2x2n1+n2 Given that, n1=first sample size of childrens pocket money=87 x1=first…

Q: America OnLine published a survey question. Among the 2,300 Internet users who responded, 20%…

A: From the given information, America OnLine published a survey question. Among the 2,300 Internet…

Q: Suppose that 24% of all donuts at the fair are misshapen. Calculate the expected number of properly…

A: Given,n=70p=0.24

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

A: The margin of error (E) is 0.02. The confidence level is 0.95.

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

A:

Q: What percent of our campus is female? The Statistical Abstract of the United States, 112th edition,…

A: