It has been reported that 20.4% of incoming freshmen indicate that they will major in business or a related field.  A random sample of 400 incoming college freshmen was asked their preference, and 95 replied that they were considering business as a major.  Estimate the true proportion of freshman business majors with 98% confidence.  Does your interval contain 20.4?

Q: In a four-year psychedelic-mushroom experiment, 93 of the 300 subjects reported experiencing “strong…

A: Obtain the point estimate for the percentage of all people who experience “strong or extreme fear”…

Q: In your work for a real estate company, you find that in a sample of 1762 home buyers, 722 found…

A: Given Data: x=722 n=1762   p^=7221762=0.4098

Q: A survey was constructed that asked 1017 people how many books they had read in the past year.…

A: The following information has been given: The sample size is n=1017. The sample mean is x¯=10.5. The…

Q: A poll conducted in 2013 found that 52% of U.S. adult Twitter users get at least some news on…

A: The proportion of the twitter users that gets at least some news is 0.52. Since the required…

Q: A study found that 73% of elementary students buy lunch at school at least once a month. How large a…

A: Given,sample proportion(p^)=0.73margin of error(E)=0.03α=1-0.95=0.05α2=0.025Z0.025=1.96       (from…

Q: A survey of shoppers is planned to see what percentage use credit cards. Prior surveys suggest 53%…

A: Find z-critical value:…

Q: In a survey of 1,200 social media users, 56% said it is not okay to be friends with your boss.…

A:

Q: An internet service provider wishes to estimate, to within one perecentage error, the current…

A: Here, we have to find the sample size for the total spam of 10000 with the given marginal error and…

Q: Explain the Other Types of Confidence Intervals.

A:

Q: (a) How many subjects are needed to estimate the mean number of books read the previous year within…

A:

Q: A survey asked, "How many tattoos do you currently have on your body?" Of the 1241 males surveyed,…

A: Given Information: Number of males surveyed = 1241 Number of males having at least one tattoo = 179…

Q: A survey found that out of 900 workers, 150 said they were interrupted by frank phone calls. Find…

A:

Q: In a survey of 50,00 people, 80% indicated that they listened to their favorite radio station…

A: Hern= 5000 P^ = 0.80 We have to construct 95% ci for p

Q: In a survey of 300 random households in a particular village, mothers have been asked if they use…

A: From the provided information, Sample size (n) = 300 From which 76 said Yes, they use cellphones to…

Q: In a​ poll, 69​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: From the given question,69% of the people polled answered yes to the question.That means,…

Q: By means of a pilot survey, it is already known that the proportion of residents in opposition to…

A: Formula for sample size is,

Q: A poll conducted randomly in 2014 found that 52% of U.S. adult Twitter users get at least some news…

A: Proportion is 0.52. The standard error 0.024 The absolute value of Zα/2 is 2.5758 using the Excel…

Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

A:

Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

Q: A survey​ asked, "How many tattoos do you currently have on your​ body?" Of the 1238 males​…

A:

Q: A vet wants to determine the proportion of household pets that have pet insurance. What size sample…

A: Given that  Margin of error=E=0.06 ,  90% confidence

Q: A survey asked, "How many tattoos do you currently have on your body?" Of the 1232 males surveyed,…

A: Given that: Total number of males surveyed, n1=1232 Number of male respondent with at least one…

Q: A researcher wishes to be 95% confidence that her estimate of the true proportion of individuals who…

A: Given that  Confidence level (C) = 95%  The true proportion of individuals who travel overseas is…

Q: In a survey of 1000 people, 850 said they would not to travel to Disney World this summer. Construct…

A: Given: n=1000 and x=850 Then,p^=xn=8501000=0.85

Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

A:

Q: A researcher wishes to estimate the proportion of adults who have high-speed internet access. What…

A:

Q: sample of 10331033 American adults, "Has drug abuse ever been a cause of trouble in your family?"…

A:

Q: A survey​ asked, "How many tattoos do you currently have on your​ body?" Of the 1202 males​…

A:

Q: A television sports commentator wants to estimate the proportion of Americans who "follow…

A: The value of confidence level (CL) is 0.95.

Q: In 2009, 33% of Americans felt that one parent should stay home to raise the children instead of…

A: Given,n=1015x=416p^=xnp^=4161015=0.4099α=1-0.99=0.01α=0.01

Q: From a recent survey, the 90% confidence interval estimate of the proportion of students who have…

A: Note: As per the guidelines only one question can be answered. Kindly,  resubmit the question with…

Q: Cora wants to determine a 90 percent confidence interval for the true proportion of high school…

A:

Q: Is 12 minutes the margin of error for this 95% confidence interval v [Select ]

A: The 95% confidence interval for the average arrival time before departure for all air travellers is…

Q: poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given…

A: Given: n= 763 ,x= 329 At 92.0 % confidence level , z score= 1.751 Need to find confidence interval…

Q: In a sample of 900 people, 378 say they snooze the alarm more than once in the morning. Find a 95%…

A: Given,   The sample proportion is,

Q: A Pew Research Center survey of 1,857 internet users found that 1,124 people agreed that online…

A: Given: CI=95% p^=11241875=0.599 n=1875

Q: It is believed that 12% of Americans use a traditional antenna to watch network television. How…

A: Given that  Population proportion p=12%=0.12 Margin of error =E =2%=0.02

Q: In June 2020, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing…

A: Given : n = 1000 X = 600

Q: Nearly one half of americans aged 25 to 29 are unmarried.  How large a sample is necessary to…

A: The formula for the sample size is as follows:

Q: (a) Starting with the 75% estimate for Italians, how large a sample must you collect in order to…

A: The method of Sample Size and margin of error will be used: In a confidence interval, the range,…

Q: A random sample of 328 medical doctors showed that 171 had a solo practice. Let p represent the…

A: Given, The best point estimate for p is,

Q: The Pizza Shop wanted to determine what of its customers ordered an only cheese pizza. Out of 90…

A:

Q: A recent study of 750 internet users in Europe found that 35% of internet users were women. What is…

A: It is given that the study of 750 internet users in Europe found that 35% of internet users were…

Q: The owner of the Gas station wishes to determine the proportion of customers who use credit card. he…

A:

Q: Which store do you think is more expensive—physical or online? A recent survey found that 45% of…

A:

Q: A survey of 800 women shoppers found that 17% of them shop on impulse. what is 98% confidence…

A:

Q: 2. A survey found that out of 900 workers, 150 said that they were interrupted by frank phone calls.…

A: In question, We have given the number of favorable cases 150 and sample size 900 then we'll find 95%…

Q: A survey was conducted to determine the proportion of adults who approve of attempts to clone a…

A: Given,   Lower bound = 0.09 Upper bound = 0.13   The objective is to find the point estimate of the…

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.