A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that the local regulations obstruct their business. b) Why do we have 95% confidence in our interval, instead of 100%

Q: A survey of 540 depressed shoppers found at 32% of them shop on impulse. What is the 99% confidence…

A: Given : Sample Size, n = 540 confidence level,c=0.99 Significance level, α…

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 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 200,000 boat owners found that 12% of the pleasure boats were named Serenity.Find the…

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Q: To the 95 per cent confidence level, find the confidence interval estimate of all college students…

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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: A sample of 100 homes in city A and 100 homes in City B was taken to estimate the proportion of the…

A: Given that, A sample of 100 homes in city A and 100 homes in city B were taken to estimate the…

Q: In a recent poll, 300 people were asked if they liked dogs, and 89% said they did. Find the margin…

A: Solution: From the given information, p-hat=0.89 and n=300.

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: We have to find the length of confidence interval for the proportion.

Q: Using the 99% level of confidence, what is the confidence interval for proportion of students…

A: Let X be the random variable such number of students attending home football games. X = 750 N: Total…

Q: Out of a sample of 150 people who walked into a fast food restaurant, 135 said they prefer ketchup…

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Q: In a recent poll, 120 people were asked if they liked dogs, and 29% said they did. Find the margin…

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Q: It has been reported that 20.4% of incoming freshmen indicate that they will major in business or a…

A: Given,n=330x=76p^=xn=76330=0.23031-p^=1-0.2303=0.7697α=1-0.96=0.04α2=0.02z0.02=2.0537

Q: A study at Harvard found that 44% of their students binge drink. You are at Princeton doing a…

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Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

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Q: A farmer wants to test the effectiveness of a pest control method in allowing strawberry blooms to…

A: Given that, Sample size n=100 Sample proportion of booms that yield marketable strawberries…

Q: The confidence interval was (22, 26) What was the point estimate? What was the margin of error?

A: Given confidence interval was (22, 26)

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: Givensample size(n)=150x=48p^=xn=48150p^=0.32confidence interval…

Q: What proportion of college students earn their undergraduate degrees in four years? A college…

A: The formula of the margin of error when the limits given are,

Q: Suppose that a random sample of 60 horror movies containing 100 character deaths was collected.…

A: we must identify zα/2 and the margin of error, E. The confidence level is stipulated to be 0.95,…

Q: The municipal government of Morong Rizal wants to estimate the percent of the citizens who are…

A:

Q: In a recent poll, 289 people were asked if they liked dogs, and 17% said they did. Find the margin…

A: Let X be the number of people who liked dogs Given: Number of people or sample size (n) = 289…

Q: A recent survey found that 35 people out of a sample of 410 South Africans suffer from diabetes.…

A:

Q: What are the the conditions for the confidence interval to be valid?

A: Given that: Mean response of 300 students and survey result give a 95% confidence interval for mean.…

Q: how many students do we need to construct a 95% confidence interval for the proportion of the…

A: here given ,  margin of error  = 3% = 0.03  confidence level = 95%  n = 150  p^= 0.68

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: 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: survey of an urban university showed that 750 of 1,100 students sampled attended a home football…

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Q: A marketing study by Ford Motor Company finds that 320 of the 650 buyers of compact cars were women.…

A: Let the population proportion of women who bought compact cars be P Given:         Sample size n =…

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

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Q: A 90% confidence interval for the difference between the proportion of college students who use…

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Q: A survey of 2500 teen-agers noted that 60% of them are extensive internet users. With 90% confidence…

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Q: Jane wants to estimate the proportion of students on her campus who eat cauliflower. After surveying…

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Q: Suppose a marketing company randomly surveyed 439 households and found that in 259 of them, the…

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

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

A:

Q: A random sample of high school seniors were asked whether they were applying for college. The…

A:

Q: When 500 college students were surveyed, 30% said that they own their car. Construct a 95%…

A: Here we want to find the 95% confidence interval.

Q: A nutritionist wants to know the population proportion of Grade 1 learners who eat vegetables.…

A: 2) It is given that the sample size n is 1200 and the number of respondents who eat vegetables (x)…

Q: Out of 3064 respondants, 919 of them said they have a dog. Using this data, compute a 95% confidence…

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Q: In a recent poll, 240 people were asked if they liked dogs, and 47% said they did. Find the margin…

A: Obtain the margin of error at the 90% confidence level. The margin of error at the 90% confidence…

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: 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: A college believes that 26% of applicants to that school have parents who have remarried. How large…

A:

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

A: