In a random sample of size n = 600 people in a city it is found that 340 of them like to watch TV for world events in the news. Compute a 90% confidence interval to estimate what the actual proportion of the city's population is watching TV for the world program on the news.

Q: In a random sample of 85 automobile engine crankshaft bearings, 10 have a surface finish that is…

A: Given that the confidence interval = 95% = 0.95 So the significance level= α = 1-0.95= 0.05 α/2=…

Q: A random sample of 120 adults showed that 42 are already fully vaccinated. Give a 95% confidence…

A:

Q: In Cleveland, a random sample of 73 mail carriers showed that 10 had been bitten by an animal during…

A: Given, n1 = 73 x1 = 10 n2 = 80 x2 = 16 confidence level = 1 - α = 0.95 α = 0.05α2 = 0.025   To find,…

Q: A department store finds that in a random sample of 200 customers, 60% of the sampled customers had…

A:

Q: In a survey of 650 randomly selected U.S. males ages 18-64, 396 say they have gone to the dentist in…

A: Given,n=650x=396p^=xnp^=396650=0.6091-p^=1-0.609=0.391α=1-0.90=0.1α2=0.05Z0.05=1.645     (from…

Q: Calculate the 95% and 99% population proportion confidence intervals for this finding.

A: Answer: Given that  the random sample of 100 people  n=100  r=74 The test statistics for population…

Q: In Cleveland, a random sample of 74 mail carriers showed that 12 had been bitten by an animal during…

A:

Q: In another pre-election poll, a pollster finds that 438 out of 600 people polled favor, Smith.…

A: Given, X = 438 N = 600 The sample proportion is given by:

Q: In a random sample of 100 men, 96 said that they had less leisure time today than they had 10 years…

A:

Q: An online survey shows that 35% of CapU students consider taking in-person classes in Fall 2021.…

A:

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 random sample about movie preferences, 33 out of 50 students said they enjoy action movies. Use…

A: Sample size = n = 50 Sample number of events = x = 33 Sample proportion = p̂ = (x+2)/(n+4) =…

Q: A simple random sample of 300 branches out of a total of 1200 branches of a UK travel agency found…

A: Given : Here population is total branches of a UK travel agency  Population Size (N) = 1200 Sample…

Q: In a simple random sample of 38 bulbs, 25 gives a good glow, What is a 85% score Confidence interval…

A: Given data,n=38x=25sample proportion p=xn=2538=0.66z-value at 85% confidence is Zc=1.44

Q: A group of medical students volunteering at a maternity hospital in Florida are looking to determine…

A: Given that, x=392,n=650 The best point estimate of the population proportion is sample proportion…

Q: In a sample of 325 college seniors, 263 responded positively when asked if they have spring fever.…

A: Given data, n=325 x=263 sample proportion p=x/n= 263/325 =0.81 z-value at 95% confidence is Zc=1.96…

Q: A random sample of 50 helmets (to protect motorcyclists) was subjected to a crash test and 15…

A: Given : Sample Size, n = 50 Number of successes, x = 15 confidence level,c=0.95

Q: A study is being planned by a pharmaceutical company to estimate the proportion of customers who…

A: We have given that,  Margin of error (E) = 3% = 0.03, confidence interval = 95%  Then,  We will find…

Q: A researcher was interested in knowing how many people in the city supported a new tax. She sampled…

A:

Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A:

Q: The Graduate Schools take a random sample of recent MS graduates (n=135) and finds that 12 of these…

A: Givenn=135x=12confidence interval = 90%p^=xn=12135=0.0889α=1-0.90=0.10α2=0.05zc=zα2=z0.05=1.6449…

Q: A national polling organization wishes to gener- ate a 98% confidence interval for the proportion of…

A: Given data,E=3%=0.03Let p=0.50z-value at 98% confidence is Zc=2.326n=?

Q: Find the 68% confidence interval for the percentage of leaky diapers with a sample of 100 diapers…

A: Let X be the number of defective diapers and n is the number of diapers. From the given information,…

Q: A survey of 52 students in grades 4 through 12 found 65% have classroom Wi-Fi access. Find the 90%…

A: We have given that,  Sample size (n) = 52 and sample proportion (p̂) = 65% = 0.65  Then,  We will…

Q: In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of them use the Internet…

A: We want to calculate the 90% confidence interval for each of the following proportions

Q: In a sample of 40 water specimens taken from a construction site 26 contained detectable level of…

A: Obtain the 99.9% confidence interval for the population of water specimens that contain detectable…

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

A:

Q: A random sample of 100 preschool children in Kent revealed that only 60 had been vaccinated. Give…

A: Sample size:From the information,  a random sample of 100 preschool children has been…

Q: consider  a random sample of 300 students in a university,75 of them declared that they like playing…

A:

Q: A recent survey showed that among 650 randomly selected subjects who completed 4 years of college,…

A:

Q: In a random sample of visitors to a famous touristattraction, 84 of 250 men and 156 of 250 women…

A: Calculate the sample proportion of men who bought souvenirs.  Similarly, calculate the sample…

Q: A manufacturer interested in estimating the fraction of defectivE units produced. A random sample of…

A: The answer is given using the formula of the confidence interval.

Q: Of 1000 randomly selected cases of lung cancer, 823 resulted in death.  H0: p=0.85 Ha: p does not…

A: Confidence interval: The (1-α) % confidence interval for proportion p is given by,

Q: In a random sample of 145 students, we find that 53% have attended a baseball game at some point in…

A: Given,sample size (n)=145sample proportion(p^)=0.53α=1-0.95=0.05α2 =0.025z0.025 =1.96

Q: A chain of coffee shops wishes to determine how many of their customers prefer Mocha Latte. A random…

A:

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: In a recent survey of 500 teenagers, 18.6% indicated that they had eaten junk food while watching TV…

A: Given Data: p^=0.186n=500

Q: A political candidate is anxious about the outcome of the next election. To have his next survey…

A: A political candidate is anxious about the outcome of the next election. To have his next survey…

Q: A research team interested in the proportion of patients at a local hospital that are admitted to…

A: GivenSample size = n =298number of patients with out insurance be X =109The proportion of patients…

Q: In a random sample of 500 deer hunters it is found that 114 filled their tag (i.e. got a deer).…

A: INTRODUCTION :  CONFIDENCE INTERVAL FOR POPULATION PROPORTION           Let P be the proportion of…

Q: A corporation employs 148 sales representatives. A random sample of 60 of them was taken, and it was…

A: Given information: The volume of orders taken in a month were compared from the same month last…

Q: In a random sample of 200 females and 100 males who watched a certain television program, 94 females…

A: For Females : Out of 200 females , X = 94 females indicated they like it Sample proportion 1 =…

Q: In a random sample of 250 students who enrolled in Science, 150 took notes during classes. Find an…

A: Given that n=250,x =150,alpha =0.05 Find an approximate 95% confidence interval for the population…

Q: In a recent poll of 1200 randomly selected adult office workers, 32% said they had worn a Halloween…

A: From the given information, Consider, p = proportion of adults who said they had worn a Halloween to…

Q: From a random sample of 185 children from school G, 108 indicated they wanted to study science in…

A:

Q: According to some car loan statistics, 44% of Americans are relying on an auto loan to pay for their…

A: Givenp^=0.44sample size(n)=1500confidence interval = 95%

Q: Suppose you compute a confidence interval with a sample size of 37. What will happen to the…

A: If the sample size increases from 37 to 70 then, the margin of error of the confidence interval…

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

A:

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

A: Given that  p^1=7.8%=0.078p^2=8.7%=0.087n1=11937n2=4892p^=n1p^1+n2p^2n1+n2=0.0806 Confidence…

Q: A random sample of 75 college students of MSU is selected and 16 are found to have motorcycles on…

A: As per our guidelines we are suppose to answer only one question Givensample size(n)=75no.of…