A professor wanted to know what proportion of college students believe in ghosts. She polled 200 students and found that 58% said they believe in ghosts. Create a 99% confidence interval for the true proportion of college students believing in ghosts.

Q: Why does increasing the confidence level result in a larger margin of error?

A: We know that the Margin of error is directly proportional to the test statistic's critical value,…

Q: Explain how the Choosing of a Level of Confidence is done.

A: The level of confidence represents how often the true percentage of the population lies within the…

Q: In a survey of 1250 U.S. adults, 363 said that their favorite sport to watch is football. The 95%…

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Q: In a survey of 517 music teachers, 403 said that the video games Guitar Hero and Rock Band have a…

A: Solution: Let X be number of music teachers said that the video games Guitar Hero and Rock Band have…

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

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Q: A television station surveys 200 customers and finds that 23% of customers watch the evening news.…

A: Given data n=200 p=23% confidence level=99%

Q: Generally speaking, what is the difference between a confidence interval and a prediction

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Q: Is the difference between the two indicators significant at the 95% confidence level?

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Q: Explain the Other Types of Confidence Intervals.

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Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

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Q: A recent study by the u.s. census bureau determined that the median monthly housing rent was $641.…

A: The median is middle value of the observations, above or below which 50% of the observations lie.…

Q: The principal of a school claims that 30% of grade 3 pupils stay in the playground after their…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: If α = 0.05, then what is the confidence level?

A: Given: α = 0.05   we know that, Confidence level+ α = 1

Q: In your sample of 200 individuals, 10 people identified as bisexual. What is the true proportion of…

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Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

Q: The higher the level of significance is, the lower the level of confidence True False

A: We have to find out startment is true or false...

Q: Explain when you would use the z value or the t-value to calculate a confidence interval

A: Z value: The z value is used for finding the confidence intervals for single population proportion,…

Q: In general, when you increase the confidence level for a confidence interval using the same sample…

A: As confidence level increases critical value is going to increase .  Here they given sample…

Q: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…

A: Given: Number of adults = 1000 Percentage of people who chose chocolate = 13% Margin of error =…

Q: Why is a 99% confidence interval wider than a 95% confidence interval?

A: The confidence interval formula is sample statistic±Margin of error. The margin of error is the…

Q: A researcher wants to do a study to see what the proportion of vaccinated people is in a certain…

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Q: in a sample of 855 bartenders, 48.0% report hearing complaints from patrons about their jobs. If the…

A: From the given information, the sample size (n) is 855. The sample proportion (p) is 48% that is p =…

Q: What Z score would be used to construct a 90% confidence level? Is it ... a. 1.65 b. 2.33 c.…

A: Confidence Level = 90 Significance Level = α = (100-90)% = 0.1 Critical value = z* = 1.65   […

Q: Explain the three properties of confidence intervals.

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Q: Find the confidence level and a for an 88% confidence interval.

A: Here use confidence level and significance level as alternative of each other

Q: Construct a 95% confidence interval for the proportion of college students who say they own their…

A: Given : n=410 , X=155  , α=0.05 We want to find the 95% confidence interval for the proportion of…

Q: What would answer be at 99% confidence interval?

A: We have given that,  Sample proportion (p̂) = 64% = 0.64 and sample size (n) = 550 Then,  We will…

Q: What is the lower endpoint of a 95% confidence interval for the percent of students who like online…

A: Given Level of significance ɑ=0.05, x=92, n=134

Q: The 85.7% confidence interval estimate for p was (0.14, 0.16). Find ?′ and ME

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Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A: In question, We'll discuss that which confidence level produced widest confidence interval. The…

Q: The pizza Shop wanted to determine what proportion of its customers ordered an only cheese pizza.…

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Q: A university planner wants to determine the proportion of undergraduate students who plan to attend…

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Q: Calculate a 95% confidence interval for the proportion of clients that would recommend the company

A: Concept: The sample proportion of the sample of size n can be defined as:  Here, X = Total number…

Q: People were surveyed worldwide, being asked the question "How important is acquiring wealth to you?…

A: The sample proportion is calculated using the formula:

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: Given that among 500 respondent , 11% chose chocolate pie and the margin of error was given as 4…

Q: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…

A: Solution: The results from a poll of 2010 adults who are asked to identify their favorite pie

Q: Fatima bought a box containing 122 sweets of different colors, 19 of them in red. What is the 95%…

A: The Probability of red sweets is given by: P=19122=0.1557 The z-score for 95% confidence is given…

Q: Through polling, it was estimated that the percent of people who will vote for a particular…

A: Given information Percentage of people who will vote in a upcoming election p-hat = 36.2% Margin of…

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: The probability of people choose chocolate pie is 0.13.

Q: previous election, the confidence interval for the proportion of likely voters who would vote for…

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Q: Suppose we estimated that 68 percent of Santa Fe students believe that black coffee is disgusting.…

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Q: Explain what happens when finding the margin of error if all stays the same except that the…

A: Conditions with respect to confidence interval and the margin of error:   As the confidence level…

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A:

Q: A nutritionist wants to know the population proportion of Grade 1 learners who eat vegetables.…

A: 2) It is given that the sample size n is 1200 and the number of respondents who eat vegetables (x)…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: Given , Among the 500 respondent 14 chose chocolate pie , and margin of error was given as 5

Q: An economist wants to know if the proportion of the children in the United States that speak a…

A: It is given that sample proportion p-hat is 0.22 and the margin of error is 0.02.

Q: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…

A: Given,sample size(n)=1000sample proportion(p)=0.14

Q: Imagine that the confidence interval around a candidate's popularity score is [37.22,48.86],what is…

A: The confidence interval provides an estimated range of values that includes an unknown population…

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.