The National Center for Education Statistics reports that the proportion of college freshmen who return to the same school for their sophomore year is 0.71. Suppose we select a random sample of 490 freshmen from across the nation. What is the expected value of the sampling distribution model for the proportion of 490 freshmen that will return to the same school for their sophomore year? a) What is the standard deviation of the sampling distribution model for the proportion of 490 freshmen that will return to the same school for their sophomore year? b)  What is the probability that the proportion of these 490 freshmen that return to the same school for their sophomore year is less than 0.66?

Q: uppose the true proportion of voters in the county who support a new fire district is 0.36. Consider…

A: Given that, p = 0.36 1 - p = 1 -0.36 =0.64 n = 93

Q: Suppose the true proportion of voters in the county who support a new fire district is 0.42.…

A:

Q: Suppose the true proportion of voters in the county who support a restaurant tax is 0.57. Consider…

A: The information provided in the question are as follows : Population proportion (p) = 0.57 And…

Q: e standard deviation of a sampling distribution is referred to as its standard error.

A: Sampling distribution is the probability distribution of the statistic of the sample like sample…

Q: For a particular jelly bean manufacturing company it is known that 50% of all jelly beans produced…

A: We have to find out the mean of the sampling distribution of the sample proportion...

Q: According to the national Center for Education Statistics, 20% of students who recently earned…

A: INTRODUCTION :  SAMPLING DISTRIBUTION :              let us have the number of samples from the…

Q: The “best estimate” of the mean of a parent distribution, using a data set consisting of N samples,…

A: The given statement is,  The “best estimate” of the mean of a parent distribution, using a data set…

Q: In the United States, someone is sexually assaulted every two minutes, on average, according to a…

A:

Q: Suppose the true proportion of voters in the county who support a new fire district is 0.36.…

A:

Q: What is the mean of this distribution?  What is the standard error (i.e. the standard deviation) of…

A: The information provided in the question are as follows : Population proportion (p) = 0.61 And…

Q: Joan’s finishing time for the Bolder Boulder 10K race was 1.81 standard deviations faster than the…

A: Solution: Let X be the  women  finishing time for the Bolder Boulder 10K race has normal…

Q: Suppose that a study of elementary school students reports that the mean age at which children begin…

A: The provided information are: Population mean (µ) = 5.7 Population standard deviation (σ) = 1.2…

Q: Suppose that we randomly select a sample of 80 measurements from an infinite population having a…

A: 1) Given: Mean μ=30 Standard deviation σ=5 Sample size n=80

Q: Suppose the true proportion of voters in the county who support a school levy is 0.35. Consider the…

A: Given The mean of the sampling distribution of proportion is, μp^=p    =0.35 The mean of the…

Q: Suppose the true proportion of voters in the county who support a restaurant tax is 0.52. Consider…

A: Given that, Sample size n=214 Proportion of voters in the county who support a restaurant tax p=0.52…

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: Suppose that the efficacy of a certain drug is 0.53. Consider the sampling distribution (sample size…

A: Given data, p=0.53 n=105

Q: when an opinion poll calls landline telephone numbers at random, approximately 35% of the numbers…

A: Binomial distribution: A discrete r.v. X taking values 0,1,2,3, …., n is said to follow a binomial…

Q: Korpe Airlines has a flight from London to Manchester that will be booked to capacity. The airline…

A: From the given information, The price of a ticket on the flight is £240, and customers are required…

Q: 8) The distribution of weekly salaries at a large company is unknown with a mean of $1000 and a…

A: The distribution of weekly salaries at a large company is unknown with a mean of $1000 and a…

Q: What is the probability that the mean income of the sample from country A is above ​$​46,249? (Round…

A:

Q: uppose the true proportion of voters in the county who support a restaurant tax is 0.65. Consider…

A: Solution: Given information: n= 196 Sample size  p= 0.65 Population proportion.

Q: United States are mixed racially and ethincally.  Consider the population consisting of all married…

A: Binomial distribution: A discrete r.v. X taking values 0,1,2,3, …., n is said to follow a binomial…

Q: Suppose that among the population of smartphone owners with 16GB of storage, the mean amount of…

A: From the provided information, Mean (µ) = 13 GB Standard deviation (σ) = 3 GB

Q: 9. During an independent research, 2500 randomly selected people were interviewed whether they visit…

A: Given The data is as follows:Sample size, n=2500 Sample proportion, p=0.7

Q: 3 it is generally believed that nearsightedness affects about 12% of children. A school district…

A: 12 %  p = 12/100 = 0.12  q = 1 -p = 1-0.12 = 0.88  n = 133  (A) :  np = 133*0.12 = 15.96  nq =…

Q: Average salaries for full-time associate professors in United States doctoral departments of…

A: Mean=71955, standard deviations=13513, n=200

Q: Suppose the true proportion of voters in the county who support a new fire district is 0.35.…

A: the pdf of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: According to a 1998 poll conducted by Gallup of 5000 people, 32% of Americans fear putting their…

A:

Q: It is generally believed that 49 percent of all college students complete their college careers.…

A:

Q: The scores of individual student on the American College Testing (ACT) Program Compsite College…

A: Given that - The scores of individual student on the American College Testing (ACT) Program Compsite…

Q: According to the National Association of Colleges and Employers Spring 2019 Salary Survey, the…

A: The provided information is as follows:The average starting salary for 2018 college graduates was…

Q: A surprising fact is that only 56% of all teens use a password on their mobile device. If a poll…

A: It is given that the standard deviation is 1.6%.

Q: Calculate the mean and standard deviation of the sampling distribution of p?

A:

Q: Suppose the true proportion of voters in the county who support a specific candidate is 0.48.…

A: Binomial distribution: A discrete r.v. X taking values 0,1,2,3, …., n is said to follow a binomial…

Q: The manager of the local Walmart Supercenter is studying the number of items purchased by customers…

A: (As per our standard guidelines, we are supposed to answer only 3 sub-parts)To find the mean number…