A researcher wants to estimate the proportion of the population which possesses a given characteristic. A random sample of size 800 is taken resulting in 360 items which possess the characteristic. The point estimate for this population proportion is 0.55 0.45

Q: What sample size would be required for the width of a99% CI to be at most .05 irrespective of the…

A: The confidence level is 99%. Therefore, α = 0.01 and α/2=0.005. The margin of error is 0.05 Since…

Q: At a certain college, it is estimated that at most 35% of the students ride bicycles to class. At…

A: given  let p = 0.35 represent the proportion of students who ride bicycles to class  let x = 28…

Q: A sample of n=16 is selected from a population = 100 and σ= 32. If the sample mean is 127, what is…

A: z-score for sample mean: From the given information,   n=16 µ=100 σ=32 x-bar=127   Therefore,

Q: In a survey of 200 females who recently completed high​ school, 70​% were enrolled in college. In…

A: Denote p1, p2 as the true population proportions of females and females, who recently completed high…

Q: The symbol u, represents the mean of a sample of size n. True False

A:

Q: 8) For a random sample of size 64, find the probability that the sample mean will lie between…

A:

Q: In a random sample of size 58, 29 people say they generally get less than 8 hours of sleep a night.…

A: Solution: Let X be the number of people say they generally get less than 8 hours of sleep a night…

Q: Which of the following is NOT necessary to determine how large a sample to select from a population?

A: question:

Q: The number of calculators, X, owned by students at a school has the following distribution. If a…

A:

Q: The following table is based on a random sample of people age 18 and older who said they were…

A: b) Given information:   Male Female Total Bringing a laptop 354 307 661 Not Bringing a laptop…

Q: The appropriate interval width for a random sample of 100 observations that fall between 50 and 250…

A: Given, A random sample of 100 observations that fall between 50 and 250 is:  The formula for class…

Q: A. When circuit boards used in the manufacture of compact disc players are tested, the long run…

A: Provided information is; Let X be the number of defective boards in a sample of size n=25, so  X~…

Q: For a population with σ = 12, how large a sample is necessary to have a standard error that is:…

A: What the standard error gives in particular is an indication of the likely accuracy of the sample…

Q: d. What is the probability that the sampling error made in estimating the population mean salary of…

A:

Q: Given a population of 5 and a sample size of 3, what is the tota possible random samples that can be…

A: Given:  Population size, N = 5  Sample size, n = 3  The total number of random samples that can be…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Solution: The proportion of students who are receiving financial aid is calculated as: The dean…

Q: The symbol u represents the mean of a sample of size n. True False

A: We know that the  μ represents the population mean which is equal to the E(X) i.e. μ=E(X) is known…

Q: ith the given data, consider a sample size of 15. How can you randomly select the 15 from the…

A: In the method of systematic sampling, choosing a Kth sample from the population yields a systematic…

Q: The appropriate interval width for a random sample of 100 observations that fall between 50 and 250…

A: The number of classes is given by Sturge's formula n=1+3.322log(N)=1+3.322*log(100)=7.644≈8 Interval…

Q: Questlon 5 of 10 Suppose that a population parameter is 0.1, and many samples are taken from the…

A: Definition :   A population proportion is the proportion of individuals in a population sharing a…

Q: In a survey of 220 males ages 20 to 24, 41% were neither in school nor working. In a survey of 230…

A: From the provided information,

Q: How many possible samples of size 5 are possible from a population of size 70?

A: Combination Rule: The arrangement of r objects from n different objects is given by:

Q: 1. How many possible samples of size 2 can be formed? 2. List all these possible samples and…

A: here given box contains 4 balls numbered 1,3,5,7 two balls are chosen from this box with…

Q: Assume that, for a given test, the population mean is µ=50 and the population standard deviation is…

A: Mean = 50 Standard deviation = 10 Sample size, n = 25

Q: Suppose that a random sample of size 1 is to be taken from a finite population of size N. a. How…

A: (a)Justification:When the sample size is 1 then the samples that are possible to drawn without…

Q: A large collection of 1-digit numbers should have about 50% odd and about 50% even because are odd…

A: The digits are given by,  S = {9,1,5,4,7,0,3,9,2,7,9,2,3,0,9,1,0,5,8,9,2,2,1,0,7,0,4,3,9,0} Given…

Q: A group of students need to submit a project and they need to survey people about their daily…

A: see the handwritten solution

Q: Suppose a population distribution has a mean of 86.1 and a a random sample of 83 observations from…

A: Given that x=Sample mean=74.6 μ=Population mean=86.1 n=Random sample=83

Q: In a sample of size 20, the sample mean is 60. In this case, the sum of all observation in the…

A:

Q: A study was commissioned to find t the residents in certain town. The s random sample of 114…

A:

Q: Assume that, for a given test, the population mean is µ=50 and the population standard deviation is…

A: given: Population mean (μ)=50 Population standard deviation (σ)=10 Sample mean (M)=54 Sample size…

Q: How many simple random samples of size 3 can be selected from a population of size 7? а. 35 b. 210…

A: Answer - How many simple random sample of size 3 can  be selected from a population of size 7 ?

Q: A simple random sample of 60 items from a population with o = 9 resulted in a sample mean of 31. If…

A: Given,n=60x¯=31σ=9

Q: For a sample of size 5, if x -x=-5, x, -X =9, x, -X =-7, and x, -x -2, then the sample standard…

A: Given: data n =5 to find : sample standard deviation     value (xi -x)2 x1- x -5 -52 = 25 x2…

Q: The symbol μx¯   represents the population mean of all possible sample means from samples of size n.…

A: Given that, The symbol µx̄ represents the population mean of all possible sample means from samples…

Q: Given a population that containing five numbers 2, 3, 6, 8 and 11. If all random samples of size 2…

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

Q: Suppose a simple random sample of size n=50 is obtained from a population whose size is N=20,000 and…

A: Solution

Q: all samples lead to a good prediction about an entire population Select one: O True O False

A: The given statement "all samples lead to a good prediction about an entire population " is False.…

Q: In the population, a parameter has a value of 10. Based on the means and standard errors of their…

A: A statistic's sampling variability is usually measured by its standard error; the smaller the…

Q: A simple random sample of 100 high school students who took the AP exam in statistics is taken from…

A: Solution:- from given information Null hypothesis H0:p1=0.4,p2=0.25,p3=0.23,p4=0.12Alternate…

Q: A researcher wants to estimate the proportion of the population which possesses a given…

A: It is given that  A researcher wants to estimate the population proportion which possesses a given…

Q: The symbol μx¯ represents the mean of a sample of size n. True False

A: The sampling distribution of sample means of size n follow normal distribution with mean and…

Q: In a survey of 220 males ages 20 to 24, 36% were neither in school nor working. In a survey of 250…

A: Given that,sample one, n1 =220, p1= x1/n1=0.36sample two, n2 =250, p2= x2/n2=0.46finding a p^ value…

Q: A reader wrote in to the “Ask Marilyn” column in Parade magazine to say that his grandfather told…

A: The null hypothesis is a simple statement about the value of the population parameter which is…

Q: In a simple random sample of size 100, there were 25 individuals in the category of interest.…

A: Denote p as the true proportion of individuals in the category of interest.

Q: In a survey of 250 males ages 20 to 24, 37% were neither in school nor working. In a survey of 240…

A: The Denote p1, p2 as the true population proportions of males and females ages 20 to 24 who were…

Q: 5. At a certain college, it is estimated that at most 35% of the students ride bicycles to class. At…

A: Given information: It is found that 28 students out of 90 in a certain college ride bicycles to the…

Q: In 1945, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: GivenA hypothesis is conducted to compare two proportionsThe Test statistic is 3.60The p value is…

Q: a sample of at least 10. (n=10)

A: The best way to ensure sample represent the population it came from accurately is to make sure that…