A pollster wishes to estimate, with 95% confidence, the proportion of people who believe that recent changes in climate are primarily due to human activity. Find the minimum sample size necessary to achieve a margin of error of less than 3%. Assuming no previous estimates are available. Round your answer up to the next integer. Assuming a previous estimate of 0.70. Round your answer up to the next integer.

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: Find the sample size need to find the Population Mean if the margin of error is $105, the confidence…

A: Solution: From the given information, confidence level is 0.95, σ=315 and E=105.

Q: Find the mean of the set of data below and construct a sampling distribution, without replacement…

A: Mean is generally represented as total sum of all observations divided by number of observations.…

Q: Many states are carefully considering steps that would help them collect sales taxes on items…

A: Solution: 6. From the given information, confidence level is 0.95 and E=0.03.

Q: With good sampling practices, what percentage of possible values for the sample mean will lead to a…

A: Solution: Type I error: Reject the null hypothesis even though it is true.

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

A:

Q: Find the sample size using the range rule of thumb to estimate a.

A: Given : Highest observation=155 bpm Lowest observation=35 bpm Margin of error=E=3 bpm Significance…

Q: Find the standard error of the mean for each sampling situation assuming a normal population o = 54,…

A: From the provided information, Population standard deviation (σ) = 54 Sample size (n) = 9

Q: a) With no prior research, what sample size should you gather in order to obtain a 0.015 margin of…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: A telephone company wants to estimate the mean number of minutes people in a city spend talking long…

A:

Q: (a) What would the sampling distribution of the sample mean for a random sample of size n=2 years…

A:

Q: Find the estimated standard error for the sample mean

A: Here  n = 14 and SS= 4238.

Q: Among the random and non-random sampling techniques that we have, which do you think is the most…

A: Random/Probability sampling is a technique in which each member of the population has an equal and…

Q: Which statement is true? larger sample sizes produce greater sampling error larger sample sizes…

A: Option c) is correct. greater sampling error produces greater margin of error

Q: In order to estimate the population proportion with a high school education,  you need a minimum…

A:

Q: Suppose that you have a group of 1,000 city government employees and you want to survey them to find…

A: Given Information: Total Population = 1000 Margin of error = 0.05 Consider the proportion = 0.5 The…

Q: Given the desired margin of error, population standard deviation, and level of significance, we use…

A: Solution

Q: Suppose the true proportion of voters in the county who support an independent candidate for county…

A: We have given that,  True proportion or probability (p) = 0.42 Then,  q= 1 - p = 1- 0.42 = 0.58 q=…

Q: Suppose that you are attempting to estimate the weight of 600 parts. In order to use the infinite…

A:

Q: We need to estimate the percentage of businesses that plan to hire additional employees in the next…

A:

Q: When estimating the proportion of Ole Miss students that support moving the Confederate statue, how…

A:

Q: If a manufacturer conducted a survey among randomly selected target market households and wanted to…

A: From the provided information, Margin of error (E) = 6% that is 0.06 Confidence level = 95% The…

Q: should their sample size be?

A: here use solvin's formula

Q: If a manufacturer conducted a survey among randomly selected target market households and wanted to…

A: question: If a manufacturer conducted a survey among randomly selected target market households and…

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: Find the interval containing the middle-most 34% of sample means:

A: Let X denote the distribution of values and x¯ be the sample means of the samples of size n=15.…

Q: Suppose the true proportion of voters in the county who support a school levy is 0.65. Consider the…

A: The true proportion of voters in the county who support a school levy is p=0.65 The standard…

Q: In preparing a report on the economy, we need to estimate the percentage of businesses that plan to…

A:

Q: A researcher plans to conduct a survey. If the population on High City is 1,000,000 find the sample…

A: To calculate the sample size (n) given the population size (N) and a margin of error (e), we use…

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A:

Q: If you have a sample of n=25, what is the standard error if the population standard deviation =60

A:

Q: In the textbook, a sampling distribution can be regarded as approximately normal when which…

A: Answer:-  Sampling data can be regarded as approximately normal when this conditions met:-

Q: estimate the population proportion p,what is the minimum sample size we need in order to achieve a…

A: Solution: From the given information, confidence level is 0.95, p=0.1 and E=0.01.

Q: What sample size is needed to give a margin of error within ±1.5% in estimating a population…

A:

Q: Find the estimated standard error for the sample mean for n = 16 and SS= 3806. Round to the nearest…

A: Ans - Find the estimated standard error for the sample mean for n = 16 and SS =  3806.…

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

A: Solution

Q: Allan, a Grade 12 senior high school student, wants to estimate the average number of students who…

A:

Q: Consider a population proportion p = 0.27.  Calculate the standard error for the sampling…

A: It is given that population proportion p = 0.27.  The standard error of the sample proportion is…

Q: Find the minimum sample size needed to estimate the true mean with margin of error of 9 and at…

A:

Q: If we want to estimate the population proportion with a margin of error of 0.10 for a level of…

A: Given data,E=0.10z value at 90% confidence is Zc=1.645let proportion p=0.5n=?

Q: If your target population is 123, how many samples do you need for a sampling error of .05 and a…

A:

Q: Suppose the true proportion of voters in the county who support a school levy is 0.53. Consider the…

A: Given : p₀ = 0.53 , n= 101

Q: We are interested in conducting a study in order to determine what percentage of voters of a state…

A:

Q: How much "error" is too much before you are no longer confident about your estimates or research…

A: Given information: Margin of error is defined as the half the width of the confidence interval.

Q: Sketch the sampling distribution of xand calculate the probability that the sample mean will be…

A: here given, sample size n = 250 population mean and standard deviation is as follows  μ = 188and…

Q: Suppose a random sample of n measurements is selected with probability of success p = . 35. Given n…

A: Solution: From the given information, p=0.35 and n=200.

Q: How large must the sample size be in order to to estimate a true proportion to within one percentage…

A:

Q: A researcher deciding to increase the desired sample size from n = 25 to n = 100 prior to collecting…

A: Given that: A researcher wants to Increase the size of the sample from n =25 to n=100 prior of the…

Q: What does the SEM value tell us about the magnitude of sampling error?

A: Introduction: Suppose a random sample of size n is taken from a population with mean μ and standard…

Q: The sample mean X is a point estimate of the

A: Population is the whole set of observations that are used for study. Sample is the subset of the…