4. According to a 2019 Federal Reserve report, 54% of U.S. young adults who went to college took on some debt for their education. Suppose we take a random sample of 400 U.S. young adults who went to college and took on some debt, a) Find the mean and standard of the sampling distribution of ?̂. mean= ?? = standard deviation of the sample proportion, ?? =   b) Determine the probability that more than 60% of the persons in the sample took on some debt.

Q: 11. In a normal distribution, approximately 95% of the data are contained within one standard…

A: 11. Empirical Rule: 68% of the values lies between one standard deviation from the mean. 95% of the…

Q: 5. The test results of the entrance examination in CITE Technical Institute are normally distributed…

A:

Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: A survey of the mean number of cents off that coupons give was conducted by randomly surveying one…

A: The sample size n is 14.

Q: 8. The psychology department is gradually changing its curriculum by increasing the number of online…

A: Since you have posted multiple questions , we will solve first question for you. To get the…

Q: 2. Construct a 95% confidence interval for the population standard deviation of a random sample of…

A: given data   sample size(n) = 15 sample standard deviation(s)  = 12.7construct 95 % ci for σ.

Q: courses results in a mean math score of 22.6 on the college entrance exam with a standard deviation…

A: Given  Population mean μ=22,n=150, sample mean x̄=22.6, s=3.2 , level of significance=0.05 Note:…

Q: The price to earnings ratio (P/E) is an important tool in financial work. A random sample of 14…

A: a)   Consider that the population mean P/E ratio of a certain stock index is μ.

Q: Suppose you are an auditor, wishing to estimate the true mean dollar amount of a company’s accounts…

A:

Q: .In a small Western city, there is a population of 1,000 individuals who received monthly payments…

A: Given,   Mean = 500 Standard deviation = 70   The objective is to find the required proportions.

Q: The quarterly returns for a group of 66 mutual funds with a mean of 3.1% and a standard deviation of…

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

Q: The quarterly returns for a group of 72 mutual funds with a mean of 2.6% and a standard deviation of…

A:

Q: As reported in Runner’s World magazine, the times of the finishers in the New York City 10-km run…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Q: 3. Salaries for teachers in a particular elementary school district are normally distributed with a…

A:

Q: A school district in Southern California offers an opportunity for families to open a college…

A: a)Suppose the random variable x defines the amount of contribution.

Q: Again, suppose we are now interested in taking random samples of 800 US adults instead of 150 and…

A: We know that,  Proportion p= X/n Where n is sample size.

Q: According to data from the 2010 United States Census, 64.2% of Americans in Susanville, CA were…

A: 64.2% of Americans in Susanville, CA were male, p = 0.642 Sample size, n = 100 Among the sample, 54…

Q: Twittering away The Pew Internet and American Life Project asked a random sample of 2253 U.S.…

A: Given Information: Sample size n=2253 Sample proportion p^=0.19

Q: 2. Assume salaries of new college graduates in computer information systems (CIS) have a normal…

A: Note: Hi! Thank you for the question, As per the honor code, we are allowed to answer three…

Q: 4 An LED lightbulb manufacturer produces lights with a mean lifespan of 10,000 hours and a standard…

A: Given information- Population mean µ = 10,000 hours Population standard deviation, σ = 1,000 hours…

Q: of all adults in a population would say “good” and 65% would say “bad” if they were asked how they…

A: Given: p = 35% = 0.35 n = 1000 The variance is calculated as: The standard deviation can be…

Q: 1. The University of North Carolina Chapel Hill received over 42,000 application for undergraduate…

A: Given, The high school GPA of freshmen has a normal distribution with mean, μ = 4.39 Standard…

Q: The daily stock price for International Business Machines (IBM) historically has followed an…

A: Given that:

Q: S. A manufacturer of digital recorders claims the distribution of life of its recorders can be…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: 9. A z00 manager claims that the daily number of foreign tourist in working days is 250. A random…

A: sample size (n) = 20 sample mean (x̄)  = Σx /n = 4817/20 = 240.85 sample standard deviation (s)  =…

Q: 5)The Internal Revenue Service reports that the mean federal income tax paid in the year was $8040.…

A:

Q: An article in the San Jose Mercury News stated that students in the California state university…

A: The population mean is  μ=4.5 The sample mean and sample standard deviation is  x=5.1sd=1.2n=49

Q: A school district in Southern California offers an opportunity for families to open a college…

A: AmountFrequency14588310241211511162171202425223064055017603751100815032002

Q: 8. Childhood participation in sports, cultural group and youth groups appears to be related to…

A:

Q: 14. Intuitively, what would happen to the interval estimate of the commuting time if we instead…

A: Population size = 673,000 Sample size = 225 Sample mean commuting time = 31 minutes Sample standard…

Q: A. About what percent of the x values from a normal distribution lie within two standard deviations…

A:

Q: 1. Assume the weekly costs for full-time daycare in some large city have a mean of $120, and a…

A: Let X be the random variable denoting weekly costs for full-time daycare in some large city. X…

Q: The amount of money spent weekly on cleaning, maintenance, and repairs at a large restaurant was…

A: Given Information: The amount of money spent weekly on cleaning, maintenance, and repairs at a large…

Q: The psychology department is gradually changing its curriculum by increasing the number of online…

A: a. Let μ denotes the population mean of new online course. The claim of the test is the new online…

Q: 7. Salaries for newly graduated college seniors is normally distributed with a mean of $42,500 per…

A: Mean = 42500 s = 5800   The probability above 36700 is given by P(X>36700) =P(X-uσ>37600-uσ)…

Q: 2. According to the International Graduation Association, on average, high school girls in Canada…

A: Here AS PER POLICY I HAVE CALCULATED FIRST MAIN QUESTION ONLY PLZ REPOST FOR REMAINING

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.