The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 80​% confident that his estimate is within seven percentage points of the true population​ percentage? Assume that nothing is known about the percentage of adults who have heard of the brand.  What is n?

Q: Apolster wishes to estimate the proportion of Unted ates voters who lavor capital punishment How…

A:

Q: 100 students at a college were asked whether they had completed their required English 101 course,…

A: Given information: Total number of students at a collage(n)=100. Number of students say "yes"…

Q: physicians

A: Number of success = x= 3145 n=5804

Q: A survey of 2390 musicians showed that 304 of them are left-handed. Find a point estimate for p, the…

A: Here Given sample size= n=2390                                         X=304

Q: A survey of 235 students indicated that 154 of them exercise at least three times a week. What is…

A: Margin of error : The margin of error is a statistical term and it is defined as the amount of…

Q: Insurance companies are interested in knowing the percent of all drivers who always buckle up before…

A: According to the given information in this question We need to find the minimum number you would…

Q: Select the correct statement below   a) If the nineteenth percentile has a value of 0.8, this…

A: We know if X is pth  percentile value that means their are p percent values are less than X.

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: The formula for the sample size is as follows: Here,zα/2 is the critical value at 95% confidence…

Q: A random sample of 324 residents of a community revealed that 30% were very satisfied withthe…

A: Given that, Critical values: By using the standard normal table of Z, the critical value for two…

Q: invested in bonds. For a = .10, does the test show enough evidence to declare that the proportion of…

A: Given: Sample size, n = 215 x = 91 Population proportion, p = 0.57  significance level

Q: Linda Silbers is a social scientist studying voter opinion about a city bond proposal for a…

A: Given that the confidence level is 95%. margin of error (ME)=5%=0.05 Consider that the p=73%=0.73…

Q: A    national    polling    organization    wants    to    be    95%    confident    that    its…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

Q: The town of Butler, Nebraska, decided to give a teacher-competency exam and defined the passing…

A: Given Information:  The raw test scores ranged from 0 to 100. Nebraska, decided to give a…

Q: A company wants to know the proportion of consumers willing to buy their product. How many people…

A: Given that ME=margin of error=1.5%=0.015z=critical value off 90% confidence…

Q: When 445 junior college students were​ surveyed, 135 said that they have previously owned a…

A:

Q: A researcher wishes to estimate the proportion of corporate executives whose annual salary is over…

A:

Q: s the newly hired manager of a company that provides cell phone service, you want to determine the…

A: It is given that margin of error (E) is 0.92 and the confidence level is 0.90.

Q: How many success in the sample? How many failures in the sample? ? What size sample does the…

A: Answer:-  Given, n=1800

Q: The head of a computer science department is interested in estimating the proportion of students…

A: Given: Margin of error E = 0.04 Significance level α = 0.05 The critical value Zα/2=Z0.05/2=1.96 The…

Q: 80 students at a college were asked whether they had completed their required English 101 course,…

A: Given: In a college 80 students completed their English 101 course with 48 students being yes. To…

Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A: Solution-: Given: M.E.=0.03,α=0.01, We take, p^=0.5 and  q^=0.5  We find how many residents do they…

Q: Find the probability of selecting either a non-smoker or a woman when you select a person at random…

A:

Q: In an outbreak of typhoid fever among attendees of an acquaintance party, 99 persons ate spaghetti,…

A: Given that:  n1=99  x1=30 n2=63 x2=20

Q: In a random survey of 1500 adults in California and 1000 adults in Oregon, you found that 228…

A: Given that

Q: A researcher wishes to estimate the proportion of adult males who are less than 5 feet 5 inches…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.90.

Q: A state legislator wishes to survey residents of her district to see what proportion of the…

A: Answer:-  Given, Margin of error=7%=0.07 Confidence level=0.90 Let P=0.5 ( as we don't have sample…

Q: An educator desires to estimate, within 4%, the true percentage of high school students who study at…

A:

Q: A researcher wishes to estimate the proportion of adult males who are less than 5 feet 5 inches…

A: Given data,E = 45 - 0.04Ƶ -value at 90% confidence is Ƶc = 1.645

Q: A recent poll of 700 people who work indoors found that 280 smoke. If the researchers want to be 98%…

A:

Q: A survey of 400O non-fatal accidents showed that 189 involved the use of a cell phone. Determine a…

A:

Q: What is the percentage of area below z= -1.51? Round to nearest tenth as needed

A: The z-score value is -1.51.

Q: A pharmaceutical researcher wants to determine the proportion of people who believes that branded…

A: For the given data n = ?

Q: A pharmaceutical researcher wants to determine the proportion of people who believes that branded…

A: Given that  Margin of error =E =1%=0.01 95% confidence.

Q: the brand manager for a toothpaste brand must plan a campaign designed to increase brand…

A: The error is ±1.96×p1-pn=0.05assume p=0.5. This will give the most conservative estimate square on…

Q: Using a random sample of 4000 TV households, a media research company found that 65.8% watched the…

A:

Q: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…

A:

Q: The Humane Society is interested in finding out how many households in America have at least one…

A: The provided information are: Confidence level = 95% = 0.95 Margin of error (E) = 4% =0.04 From the…

Q: a hospital wants to estimate the percentage of admitted patients who receive Medicare benefits. if…

A: To calculate the minimum sample size require to be 95% sure that margin of error will fall within 4…

Q: How high must a vehicle's gas mileage be in order to fall in the top 15% of all vehicles?

A: Let X be the vehicle's mileage. Let μ and σ be the mean and standard deviation of all the vehicles.…

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: Solution: From the given information, confidence level is 0.95 and E=0.05. Since the proportion is…

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: The number of households not willing to participate in the survey is 1200.

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050females, 746…

A: From the provided information,

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: Using a random sample of 4300 TV households, a media research company found that 62.2% watched the…

A: n = 7100

Q: One researcher wants to estimate the proportion of MU students who are vegetarian, 6 answered "yes".…

A:

Q: You would like to be 99.9 confident that your estimate is within 2% of the true population…

A:

Q: A manager states that in his factory, the average number of days per year missed by the employees…

A: Given that the a manager states that in his factory, the average number of days per year missed by…

Q: A sample of students is to be selected to estimate the proportion who have recieved a medical…

A: The known values are,   The sample proportion is, Critical values: By using the standard normal…

Q: On a recent Washington to London flight with 300 passengers, it was found that 100 passengers were…

A:

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.