The manager of a local fast-food restaurant is concerned about evil customers who ask for a free cup of water when placing an order, but then fill the cup with a soft drink from the beverage fountain! The manager selects a random sample of 80 customers who asked for a water cup and found that 23 of those customers filled the cup with soda from the beverage fountain. Construct and interpret a 95% confidence interval for the proportion of all customers who, having asked for a cup of water when placing an order, will fill the cup with a soft drink from the beverage fountain. Be sure to go through the entire PANIC process.

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

A: Given Data: n=150 x=48

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

A:

Q: he Indian River County Economic Development Board needs to estimate the proportion of all county…

A: The Indian River County Economic Development Board found that 28.7% of all county residents held at…

Q: The Indian River County Health Department needs to estimate the proportion of all children in the…

A: 1) It is given that n=116 and the sample proportion is 0.74.

Q: a recent survey at a small Midwestern college, 39 of 140 randomly selected students revealed that…

A: Here it is given that- total number of observations(n) = 140 Proportion (p) = 39140= 0.28 So, q =…

Q: Which of these facts would tell us that the pamphlet needs to be updated? If an appropriate…

A:

Q: The manufacturer of the ColorSmart-5000 television set claims 95 percent of its sets last at least…

A:

Q: A certain ambulance service wants its average time to transport a patient to the hospital to be 10…

A:

Q: In a recent poll, from a sample of 300 likely voters, 175 answered they approve the way the…

A: We have given that,  Favorable cases (X) = 175 and sample size     (n) = 300 then,  We will find the…

Q: The manager of a well-known bank is interested to know whether online banking is more popular…

A:

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

A:

Q: A food snack manufacturer samples 11 bags of pretzels off the assembly line and weighs their…

A: Givensample size(n)=11Mean(x)=15.7standard deviation(s)=0.70

Q: In 2003, an organization surveyed 1,500 adult Americans and asked about a certain war, "Do you…

A: Given , (1-α)100% = 90% α =0.1 Zc=Zα =NORMSINV(0.1) = -1.28

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

A: Given: Number of packages (n) = 500 Number of packages delivered on time (x) = 480 Sample proportion…

Q: A survey of 1,898 adults with lawns conducted by a researcher found that 45% of the adults said that…

A: Obtain the 95% confidence interval of the true proportion who said that dandelions were the toughest…

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: A cable company claims that 88% of its customers are fully satisfied with their service. A…

A: Given that  Sample size n =350 Favorable cases x =287 Sample proportion p^=x/n  =287/350 =0.82

Q: A medical researcher claims that smoking can result in the wrinkled skin around the eyes. The…

A: Given Information: Smokers: n1=150 x1=95 Nonsmokers: n2=250 x2=105 Confidence level is 95%

Q: company check police records on 590 accident selected at random and notes that the teenagers were at…

A: The sample proportion is computed as follows: The critical value for 95% confidence level, i.e.,…

Q: in a survey of 499 randomly selected gun owners, it was found that 62 of them said they owned a gun…

A:

Q: In a study of contamination at landfills containing construction and demolition waste, 42 leachate…

A: Solution:   The samples came from the same sample, they are not independent. It is not appropriate…

Q: A U.S. Travel Data Center survey conducted for Better Homes and Gardens of 1500 adults found that…

A: Given: sample size, n=1500 sample proportion, p = 0.39

Q: A poll is taken among residents of a city and its suburbs to determine the feasibilities of a…

A: Confidence interval: It is defined as the range which contains the value of the true population…

Q: The St. Lucie County Economic Development Board needs to estimate the proportion of all county…

A: Sample Proportion p^\hat p = 0.193   a) Sample size, n = 254 Confidence interval = 0.97 Significance…

Q: For many years businesses have struggled with the rising cost of health care. But recently, the…

A: Given n=857 P=0.57 Confidence interval is 90 %

Q: A sample of 250 items from lot A contains 10 defective items, and a sample of 300 items from lot B…

A:

Q: A survey found that 39 of 66 people who don't drink coffee often have trouble sleeping and 44 of 88…

A: Solution: Let X1 be the number of noncoffee drinkers who have trouble sleeping, n1 be the sample…

Q: e effectiveness of an advertising campaign for a certain brand of pretzel, a company obtained a…

A: The sample proportion for the first sample is as: hat p1=x1/n1=16/80=0.2 The sample proportion for…

Q: In a survey conducted by a reputable marketing agency, 231 of 1000 adults 19 years of age or older…

A: Given Data Sample Size, n = 1000 Number of successes, x = 231.0 Significance…

Q: In a 2012 survey, Gallup asked a random sample of U.S. adults if they would prefer to have a job…

A:

Q: An internet service provider sampled 540 customers and found that 55 of them experienced an…

A:

Q: The Martin County Economic Development Board needs to estimate the proportion of all county…

A: Given n=145, p^=0.327  Construct Margin of error and confidence interval.

Q: A certain article indicates that in a sample of 1,000 dog owners, 610 said that they take more…

A: Given: Sample size (n) = 1000 Number of owners who take more picture of their dog than their owner =…

Q: For many years businesses have struggled with the rising cost of health care. But recently, the…

A:

Q: A poll is taken among residents of a city and its suburbs to determine the feasibilities of a…

A: The associate with interval estimate is called a confidence interval. This probability indicates how…

Q: campaign. 1. Find the point estimate. 2. Find the standard error. Round to four decimal places. 3.…

A:

Q: A researcher who was interested in knowing how many people in a city supported a new retirement plan…

A:

Q: According to a recent Government survey, 6% of all merchandise sold in the U.S. gets returned.  A…

A: It is given that sample size (n) is 80 and x is 12.

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: n a recent Zogby International Poll, nine of 48 respondents rated the likelihood of a terrorist…

A: Given that : x = 9 n = 48

Q: The Okeechobee County Health Department needs to estimate the proportion of all children in the…

A:

Q: In a random sample of 50 patients undergoing a standard surgical procedure, 15 required medication…

A:

Q: Find the 98% confidence interval for the true difference in population proportions, pˆ A − pˆ B.

A: Given that For drug A, sample size n1 = 50, number of animals showed undesirable side effects, X1 =…

Q: A certain article indicates that in a sample of 1,000 dog owners, 660 said that they take more…

A: The provided data mentions the value of sample size, n is 660 and the value of x is 470. The sample…

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: A company that has many department stores in the southern states wanted to find at two such stores…

A: The provided information is  n1=800x1=280n2=900x2=279The proportions…

Q: In a random sample of 500 U.S. adults, 60% said that they believe that the U.S. Congress fails to…

A: Critical value: Using Excel formula “=NORM.S.INV(1-(0.05/2))”, the value of z at 95% confidence…

Q: The Indian River County Economic Development Board needs to estimate the proportion of all county…

A:

Q: The St. Lucie County Economic Development Board needs to estimate the proportion of all county…

A: It is given that 19.3% of all county residents held at least a bachelor's degree. That is, p^=0.193.…

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.