How large a sample must a pollster take in order to estimate with 95% confidence and to within 3 percentage points, the proportion of voters who are in favor of a certain measure? Use the information that several years ago the proportion was 0.12.

Q: A medical researcher says that less than 82% of adults in a certain country think that healthy…

A: Given: Sample size of data is n=600. 80% percentage of the healthy children should be required to be…

Q: A medical researcher says that less than 79​% of adults in a certain country think that healthy…

A: Given: Sample size of adults (n) = 300 Proportion of adults who think that healthy children should…

Q: A medical researcher says that less than 72% of adults in a certain country think that healthy…

A: Given information: Sample size(n)=200. Sample proportion for healthy children's should be required…

Q: A biologist claims that nearly 45 percent of all Americans have brown eyes. A random sample of…

A:

Q: Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep.…

A: Test statistic is the measure used to determine there exist significance between the sample and…

Q: Find the n amount, given that with a 95 percent confidence the error is by three percentage points…

A: Formula : Margin of error: ME=Zα/2 * √p̂(1-p̂)/n

Q: A researcher wishes to estimate the number of households with two cars. How large a sample is needed…

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Q: How large the sample size should be in order to be 98 percent confident, if the sample proportion is…

A: Given data, p=0.78 E=0.16 z-value at 98% confidence is Zc=2.326 n=?

Q: A sample of n = 7 scores has a mean of M = 16 to X = 20. What is the value for the new sample me

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Q: B. Complete the table below by supplying it with the correct answer: Claim Ho Ha 1. The average time…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: In a population with σ = 5, a score of X = 46 corresponds to a z-score of z = +0.40. What is the…

A: Solution-: Given: X=46, σ=5, z-score=0.40 We find population mean (μ)=?

Q: A medical researcher says that less than 85% of adults in a certain country think that healthy…

A: For the  given data Perform Z test for one proportion

Q: A medical researcher says that less than 78% of adults in a certain country think that healthy…

A: Solution : Given :  p = 0.78 ( population proportion )              P = 0.76 ( sample proportion)…

Q: Thirty-two percent of primary care doctors think their patients receive unnecessary medical care. If…

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Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: Given information- Margin of error, E = 7% = 0.07 Confidence level, c = 80% Since nothing is known…

Q: Suppose we want to test whether a population mean is significantly greater than or less than 10. We…

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Q: 4.) The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: (a) Given that, If the prior information is not known,  assume that sample proportion  p^=0.50…

Q: A medical researcher says that less than 74​%of adults in a certain country think that healthy…

A: It is given that n is 600 and p hat is 0.71.

Q: Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep.…

A: Claim : the percentage of commercial truck drivers who suffer from sleep apnea is not 4.1%

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

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Q: A medical researcher says that less than 84% of adults in a certain country think that healthy…

A: A random sample of 400 adults in a country is taken, 81​% think that healthy children should be…

Q: s the newly hired manager of a company that provides cell phone service, you want to determine the…

A: It is given that margin of error (E) is 0.92 and the confidence level is 0.90.

Q: 4. Travel to Outer Space A CBS News/New York Times poll found that 329 out of 763 randomly selected…

A: Given: x=329n=763

Q: A medical researcher says that less than 72% of adalts in a certain country think that healthy…

A: From the given information, let X be the number of adults in a certain country think that healthy…

Q: what level of measurement is CES-D= Possible range of scores is zero to 60, with the higher scores…

A: Introduction: There are broadly 4 scales of measurement used in Statistics, that either categorize…

Q: Travel to Outer Space A CBS News/New York Times poll found that 329 out of 763 randomly selected…

A:

Q: The owner of a bowling alley wants to estimate the percent of bowlers in the senior league. How…

A: Hi, you have posted multiple different question in one post . As per the guidelines I am obliged to…

Q: candidate for the municipal elections wishes to survey residents of her district to see what…

A:

Q: 395 out of 500 women were in favor with the new brand of skin whitening. What is the point estimate…

A:

Q: We are collecting data on the patients that have been vaccinated for the coronavirus, and the…

A: Given :The initial data shows a 90% success. We want the margin of error to be no more than 3%. We…

Q: A medical researcher says that less than 86% of adults in a certain country think that healthy…

A: solution

Q: In a study of jury behavior, two samples of participants were provided details about a trial in…

A: According our policy we can answer only first three subpart for remaining please repost the…

Q: Sarah works for the Urban Pollination Project at UW. Five years ago, 25% of urban gardens were…

A: From the provided information, 25% of urban gardens were visited by native bees that is p = 0.25 The…

Q: the brand manager for a toothpaste brand must plan a campaign designed to increase brand…

A: The error is ±1.96×p1-pn=0.05assume p=0.5. This will give the most conservative estimate square on…

Q: You are doing a research project in political science to determine the proportion of voters in your…

A:

Q: A medical researcher says that less than 76​% of adults in a certain country think that healthy…

A: Denote p as the true population proportion of adults in a certain country, who think that healthy…

Q: In a one-tail test, the p-value is found to be equal to 0.0026. If the test had been two-tailed, the…

A: Here use basic concepts of p value

Q: A medical researcher says that less than 86% of adults in a certain country think that healthy…

A: Given,sample size(n)=400sample proportion(p^)=0.84α=0.10

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35…

A: The z-test determines the claim about one population proportion.

Q: John Davis, a manager of a supermarket, wants to estimate the proportion of customers who use food…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: medical researcher says that less than 85​% of adults in a certain country think that healthy…

A: Given that  A medical researcher says that less than 85​% of adults in a certain country think that…

Q: A medical researcher says that less than 88% of adults in a certain country think that healthy…

A: At α=0.01, the critical value is -2.326. (From the z-tables)

Q: A medical researcher says that less than 79% of adults in a certain country think that healthy…

A:

Q: Suppose you want to test the claim that a population mean equals 34. (c) State the alternative…

A: From the provided information, The claim is that population mean equals 34, that is H0: µ = 34

Q: A medical researcher says that less than 86​% of adults in a certain country think that healthy…

A:

Q: One researcher wants to estimate the proportion of MU students who are vegetarian, 6 answered "yes".…

A:

Q: A medical researcher says that less than 72% of adults in a certain country think that healthy…

A:

Q: A medical researcher says that less than 85​% of adults in a certain country think that healthy…

A:

Q: A recent study indicated that 24% of the 150 women over age 55 in the study were widows. Round up…

A: Given That  Margin of error =E =0.02 Population proportion p=24%=0.24 90% confidence interval.

Q: A medical researcher says that less than 81% of adults in a certain country think that healthy…

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.