Call me: A sociologist wants to construct a 95% confidence interval for the proportion of children aged 8-10 living in New York who own a smartphone. Part 1 of 3 (a) A survey by the National Consumers League estimated the nationwide proportion to be 0.29. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.02 ? A sample of 1977 children aged 8-10 living in New York is needed to obtain a 95% confidence interval with a margin of error of 0.02 using the estimate 0.29 for p. Part: 1 / 3 Part 2 of 3 (b) Estimate the sample size needed if no estimate of p is available. A sample of children aged 8-10 living in New York is needed to obtain a 95% confidence interval with a margin of error of 0.02 when no estimate of p is available. X

Q: When estimating the minimum sample size required for a research, if we do not have the preliminary…

A: It is given that, preliminary estimate of proportion is not known.

Q: What is the mean of the sampling distribution of sample means? (Please enter an exact answer.)

A: According to the central limit theorem, if the sample size is sufficiently large, i.e., the sample…

Q: Consider sample of size 3 selected from the population (3,6,9,15).calculate the sample mean,median…

A:

Q: Explain the difference between the following sampling techniques: simple random sampling, stratified…

A: Simple random sampling : It is a the sampling when samples are chosen randomly, where each unit has…

Q: You work for NASA and are interested in determining the population proportion, with 99% confidence,…

A:

Q: A researcher wants to estimate the proportion of electric car owners in Los Angeles County. The…

A: According to the given information, we havePopulation proportion, p = 10% = 0.10Margin of error, E =…

Q: You wish to estimate, with 90% confidence, the proportion of tablet owners who use their tablets…

A: Solution: 1. From the given information, confidence level is 0.90 and E=0.02. Since the proportion…

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

A: Formula for the sample size needed to estimate a population proportion is

Q: Suppose that your sample size was 37, what is P(t<-1.74) (Negative 1.74)?

A: Given information- Sample size, n = 37 t-score = -1.74 We have to find the p (t&lt;-1.74). Degree of…

Q: 2. Let sample proportion . How large a sample should be taken to be 95 % sure that the error of…

A: As per our guidelines we are supposed to answer only one question per post. Given that, margin of…

Q: What is true about the sampling distribution of the mean retings reported to you by the market firms

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Q: What information do you need to decide on a sample size that will provide adequate statistical…

A: Adequate statistical power is the power of probability with the rejected null hypothesis. Generally,…

Q: What shape do we need the sampling distribution of sample means to be to do a hypothesis test ?

A: In hypothesis test, sampling distribution of sample mean is Normal distribution. Normal distribution…

Q: A smaller sample size will cause the margin of error to decrease. True False ONLY If false, change…

A: Given problem Given that   A smaller sample size will cause the margin of error to decrease.  Ans)…

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: What happens to the sample size when you don’t know a prior sample proportion?

A: To calculate the sample size when we do not know prior sample proportion.

Q: Explain the basic techniques of random sampling and these key concepts: population, sample,…

A: Population:Population is entire pool of people, objects or events from where a group is selected for…

Q: Find the minimum sample size required to estimate the proportion of the population that supports a…

A: From the given information,   Margin error = 0.042 Assume sample proportion = 0.5   The objective is…

Q: Is the sample size of survey is multiplied by 100, then by what factor is the margin of error…

A: Solution

Q: What is a sampling distribution of means? Use your knowledge of the standard error of the sample…

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Q: estimated that 80% of people with type 2 diabetes are overweight. You want to do a study on type 2…

A: Given Data : Margin of error: ME = 0.0463 sample proportion: p̂ = 0.8…

Q: In terms of ratio projections and difference projections why are they important in non-statistical…

A: Ratio projections and difference projections are important in non-statistical sampling because they…