Katy Perry is currently the most popular account on Twitter® with about 100 million followers. Mrs. Zane wondered what proportion of Katy Perry’s Twitter followers are female, so she selected a random sample of 500 of Katy Perry’s followers. In the sample, 308 are female. Construct a 90% confidence interval for the proportion of all of Katy Perry’s Twitter followers who are female. Follow the four-step process and upload a scan/picture of your work.

Q: results

A: Let X be the number of medical doctors that had a solo practice.  N : A sample size of medical…

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

A:

Q: What confidence interval will have the larger margin of error when using the same sample data and…

A: Since we know that, Confidence interval = the estimate ± the margin of error Margin of error is…

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: We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 500…

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

Q: What are the conditions for a confidence interval?

A: A confidence interval tells the possible range around the estimate and also how stable the estimate…

Q: As Senior Class President, one of your lifelong duties is overseeing the planning of your high…

A:

Q: he confidence interval was (73, 83) What was the point estimate? What was the margin of error?

A: Given: Lower limit =73 Upper limit =83 The point estimate can be calculated as: Point estimate…

Q: Suppose I wanted to know the proportion of students who are paying attention in class, so I give a…

A: Confidence Interval for Proportion A confidence interval is a statistical method that denotes a…

Q: Out of 600 people sampled, 312 had kids. Based on this, construct a 95% confidence interval for the…

A: In question,  Given that Out of 600 people sampled, 312 had kids. Then we'll construct the 95%…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: It is given that the confidence level is 0.90 and margin of error (E) is 0.01.

Q: Thirteen out of 147 randomly selected faculty members who were surveyed at a community college…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: From the provided information, Margin of error (E) = 7% that is 0.07 Confidence level = 98% Assuming…

Q: Out of 300 people sampled, 171 had kids. Based on this, construct a 95% confidence interval for the…

A:

Q: According to Thomson Financial, through January 25, 2018, the majority of companies reported profits…

A: The sample proportion of companies showed beat estimates is, p^=104162=0.6420 The sample proportion…

Q: Explain the type of Equation used for confidence interval calculation?

A: A confidence interval gives an approximate range of values which is likely to include an unknown…

Q: how would i do 19 b with a 95% confidence interval***** not 90%

A: Given Information B) Sample Mean(M) = 77.2 Sample Standard Deviation = 5.7 Sample size(n) = 9…

Q: In a survey of 2298 ​adults, 709 say they believe in UFOs. Construct a 95% confidence interval for…

A:

Q: A motorcycle dealer with the "Hd" brand wants to know the percentage of students in the city "X" who…

A: We have to find confidence interval.

Q: The confidence interval was (77, 83) What was the point estimate? What was the margin of error?

A:

Q: nutritionist

A: Please refer to the image below

Q: Out of 300 people sampled, 279 had kids. Based on this, construct a 90% confidence interval for the…

A:

Q: Of the 1,000 people, 550 people used company s's smartphone and 460 people used company a's…

A: Given: n= 1000 ,x= 550.0 At 95.0 % confidence level , z score= 1.96 Need to find confidence…

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: A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval…

A: Number of people took part in survey, n = 280 Number of veterans =63 The probability of homeless…

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: Out of 100 people sampled, 54 had kids. Based on this, construct a 90 % confidence interval for the…

A:

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.…

A:

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

A:

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: In a survey of 2291 ​adults, 708 say they believe in UFOs.   Construct a 90% confidence interval for…

A:

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: An online poll of 810 adults found that 53% of the respondents think critical thinking should be…

A: Given info: An online poll of 810 adults found that 53% of the respondents think critical thinking…

Q: Out of 400 people sampled, 276 had kids. Based on this, construct a 90% confidence interval for the…

A: For 90% confidence intervalα=1-CI=1-0.90=0.10So, zα2=z0.102=z0.05=1.645

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: In a survey of 1219 U.S. adults, 354 said that their favorite sport to watch is football. Construct…

A: According to the given information, we have Total number of U.S. adults = 1219 354 said that their…

Q: A survey of 240 teachers found that two-thirds of those surveyed do not live in Sydney. Can you…

A: The confidence interval is the combined value of sample statistic, the critical value and the…

Q: 6) When 415 college students were surveyed, 175 said they own their car. Construct a 95% confidence…

A: Given, The sample proportion is, Critical value: Using z-table, the z-critical value at the given…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

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

Q: Suppose the English department of a local university has a  total of 105 faculty members. Of this…

A: Total faculty members in the university=105 Number of part time instructor=24 One proportion…

Q: Dr. Soria surveyed 34,000+ college students about their rates of housing insecurity during the…

A: The proportion of college students experiencing housing insecurity at that time is 0.22, and the…

Q: Out of 600 people sampled, 402 had kids. Based on this, construct a 95% confidence interval for the…

A:

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: Melissa wants to estimate the proportion of adults in the U.S. who own a gun. To do so, she surveys…

A: Given information: Sample size of adults is 45, that is, n = 45. Number of adults who own a gun is…

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: Of 375 randomly selected students, 30 said that they planned to work in a rural community. Find 95%…

A: Using z ditribution to construct the interval.

Q: Out of 600 people sampled, 192 had kids. Based on this, construct a 90% confidence interval for the…

A: Given that,  x=192,n=600 The sample proportion is, Critical values: By using the standard normal…

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

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.