A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate wants a 5% margin of error at a 99% confidence level, what sample size is needed? Use technology to find the z-score and do not round between steps. Make sure you use the correct rounding rule for samples size, and give your answer in whole people.

Q: According to a gallup survey of boys 77% of boys had played computer games in the past week compared…

A: Let p1 be the percentage of boys had played computer games  p2 be the percentage of girls had played…

Q: The median has a sampling distribution. Explain why or why not?

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Q: Identify an example of a population that you would expect to be normally distributed. Explain why…

A: It is needed to define a data set that follow normal distribution.

Q: You take a sample of the heights (in inches) of 12 professional basketball players. The data are:…

A: Given data: 79, 76, 77, 79, 81, 83, 79, 76, 78, 83, 87, 85.

Q: A thousand people were sampled and classified according to their smoking and alcohol consumption…

A: It is observed that the variables smoking and alcohol consumption status are categorical.

Q: A consumer group surveyed 146 airplane travelers after a flight and found that 132 of them would fly…

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Q: Determine the type of sampling used to collect the data. A smart phone manufacturer wants to…

A: In simple random sampling procedure, each of the population unit has same chance of being included…

Q: How to determine if a sample is small or large? In my homework, the sample size is 66. The answer in…

A: Note: Hey there! Thank you for posting the question! Sometimes a sample cannot be determined as a…

Q: ​Claim: Fewer than 95​% of adults have a cell phone. In a reputable poll of 1073 ​adults, 90​%…

A: Formula for Test statistic  Test statistic ( z ) z = ( p^ - p ) / ( √( p * ( 1 - p) / n) )

Q: oes the size of a sample influence the shape of the distribution?

A: A sample is drawn randomly from a population to draw some inferences about the population. It is not…

Q: Explain the difference between an independent and dependent sample. Give an example of each.

A: Dependent samples:The two samples are said to be dependent if there exist an effect of one on…

Q: I am doing a survey and want to know how many siblings each participant has. Participant 3 leaves…

A: Introduction: Consider that there are n participants in the study. Each participant is asked how…

Q: Social Survey is an annual survey given to about 1500 U.S. adults selected at random. A recent…

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Q: What is Sample?

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Q: A medical researcher wants to do a study on the proportion of knee replacement surgeries that result…

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Q: If you increase the sample size to 50 from 30, will the standard error of the mean be smaller or…

A: When increasing the sample size to 50 from 30, the standard error of the mean would be smaller…

Q: Explain the sample mean of the difference scores varies.

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Q: According the April 12, 2017 Pew Research survey, 58% of Americans approve of U.S. missile strikes…

A: (3) Determine whether the normal approximation can be used with the given distribution or not?…

Q: Explain about the Two Independent Samples.

A: Two samples are said to be independent if the sample values selected from one population are not…

Q: How to decide one or Two Samples?

A: t-test:  (i) In the t-test, the sample size of 30 is large enough (n < 30) (ii) Samples are taken…

Q: How can I find the sample mean of these four scores ? 1,4,4,10

A: Given data, 1,4,4,10 sample mean(x)=?

Q: An electronics company wants to gauge public opinion on its products. They send out a business reply…

A: An electronic company wants to gauge public opinion on its product. The company wants the public…

Q: In a large clinical trial, 390,467 children were randomly assigned to two groups. The treatment…

A: Given that  The treatment group consisted of 197,083 children given vaccine in that 37 children…

Q: Explain Properties of the Sample Mean?

A: Mean: The arithmetic mean(also called the mean) is the most commonly used measure of central…

Q: When planning to sample a population, what can you do to improve the precision of the sample mean?

A: To Answer, What are the ways to improve the precision in a sample mean? Symbols used are Y =…

Q: An article in a newspaper states that the proportion of traffic accidents involving road rage is…

A: The proportion of traffic accidents last year is 10%.

Q: A newspaper infographic titled "Social Media Jeopardizing Your Job?" summarized data from a survey…

A: Number of recruiters 54% of people had reconsidered a job candidate based on their social media…