#6. For the next poll of the president's approval rating, we want to get a margin of error of 1% with 95% confidence. How many individuals should we sample? If you know that In the last poll his approval rate was 72% A. 775 B.7748 C.7743 D.7745 If there is no prior knowledge about the last approval rate                             A. 9600 B. 7745 C. 9601 D. 9604

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A: The data set consist of 5000 observations. The observations are 0's and 1's. An amount of data…

Q: In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation…

A:

Q: 7:21 A ll 85% A news article that you read stated that 51% of voters prefer the Democratic…

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A: Solution

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Q: According to past reports 48% of employees own a car. In a random sample of 250 employees, how many…

A: Total no.of employees=250 The percentage of employees own a car=0.48

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

A:

Q: In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation…

A: Sample Proportion The sample proportion describes the proportion of people during a sample with a…

Q: I want a 99% confidence within 2% for the true proportion of bald people in the US.  How many people…

A: Given that, Margin of error E=0.02 Confidence level is 99% Critical value: The two tailed z critical…

Q: recent study reported that 12% of people toss away about half of what they buy at the grocery store.…

A: From the given information we conduct Z test for proportion.

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A: From the given data we can conclude that, Proportion = 25% Margin of error = 1.3%

Q: In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation…

A: Given: The proportion of people who like dark chocolate more than milk chocolate is 32% Margin of…

Q: A researcher claims that based on the information obtained, 17% of young people ages 9-19 are obese.…

A: Given : Sample size  of young people ages 9-19 (n) = 200 Let X: No. of young people ages 9-19 obese…

Q: Suppose that 18% of a random sample of 2307 Miami residents said that they will donate blood in…

A: p =0.18 n = 2307

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…

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A:

Q: A recent study indicated that 43% of the 100 women over age 55 in the study were widows. Round up…

A:

Q: The national distribution of fatal work injuries in a country is shown in the table to the right…

A: The data table of the of fatal work injuries' national distribution:It is belived that the…

Q: III. The Big Smiles Portrait Studio is conducting a survey among their clients. One of the questions…

A: Question III)The sample size is .The proportion of clients who answer yes is .

Q: A claim is made that 85% of college students own a smartphone. Natalie believes that a larger…

A: Let p be the population proportion  p=0.85, x= 135, n=150  p^=x/n

Q: The British Department of Transportation studied to see if people avoid driving on Friday the 13th.…

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Q: Use the results from a survey of a simple random sample of  1045 adults. Among the  ​1045…

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Q: What kind of test should I run for this question and how do I run the test?   During the first 13…

A: We will use chi-square goodness of fit statistic to test the hypothesisGiven data and calculation…

Q: 6. In your own words, explain the difference between a statistic and a parameter

A: Since you have asked multiple question, according to our guidelines we will solve the first question…

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Q: a newspaper article claims that the average age for people who recieve food stamps is 35 years. You…

A: Given that, A newspaper article claims that the average age for people who receive food stamps is 35…

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A: Here the proportion of people liking dark chocolate is 37% with a margin of error 2.5%  So, the…

Q: We'd like to know the percentage of people living in California who owns a cell phone. How many…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: QUESTION 2 Researchers conducted two surveys about teens are their use of social media. The first…

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Q: When you hear thw words “population” and “sample,” what comes first in your mind

A: A population can be defined as a group of individuals belonging to the same species residing in a…

Q: In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation…

A:

Q: If a fair coin is tossed 10 times what is the probabilty that the first five are the same side? Ans.…

A: When a coin is tossed, then there are 2 possible outcomes: Head and tail. So, each outcome can…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.