The use of the Internet is constantly growing. How many randomly selected adults must be surveyed to estimate the percentage of adults in the United States who now use the Internet? Assume that we want to be 99% confident that the sample percentage is within 2 percentage points of the true population percentage. Assume that nothing is known about the percentage of adults using the Internet. 4421 4147

Q: Suppose that we want to estimate what percentage of all drivers exceed the 50 km/h speed limit on a…

A: Sample size for know proportion;n=p^(1-p^)zα2E2Sample size for unknow proportion;n=14zα2E2

Q: The Canine Gourmet Company produces delicious dog treats for canines with discriminating tastes.…

A: Solution: Given information: X= 42  Process average R = 6  Process  average range  n= 8 sample size…

Q: The use of the Internet is constantly growing. How many randomly selected adults must be surveyed to…

A: Solution

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

A:

Q: physicians

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

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: A survey of 2310 adults in a certain large country aged 18 and older conducted by a reputable…

A: Given information- We have given that in a survey of 2310 adults in a certain large country aged 18…

Q: quality conscious disc manufacturer wishes to know the fraction of disks his company makes which are…

A: Given Sample size =865 X=112

Q: Suppose the manager of a shoe store wants to determine the current percentage of customers who are…

A:

Q: A marketing research firm wishes to conduct a poll in a certain region to estimate the proportion of…

A: Solution: From the given information, confidence level is 0.90 and E=0.03.

Q: A recent survey found that 58% of U.S. adults use their smartphones to research and shop for…

A: The expression is  The margin of error is given as 5.3%.

Q: A research company claims that 55% of American watch TV. You test this claim by randomly sampling…

A:

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: Givenconfidence level = 90%Margin of error(E)=2%=0.02p^=0.45

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Solution: Given information: p1^=0.219 Sample proportion of male p2^=0.197 Sample proportion of…

Q: Suppose the U.S. president wants to estimate the proportion of the population that supports his…

A: Critical value: The value of α is 0.05 for 95% confidence level. Using excel formula…

Q: A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which…

A:

Q: Male penguins that weigh more than 4710 grams are considered "desirable" because the extra fat means…

A: We need to find expected value of desirable penguins Let us find out probability of a desirable…

Q: Suppose a random sample of n= 320 teenagers 13 to 17 years of age was asked if they use social…

A:

Q: In order to estimate attendance at a music festival, management counts the number of people entering…

A: it is follow A,P with first term a = 2250, d = 2250 , n = 20

Q: Suppose, you want to know, if majority of the people prefer chocolate ice-cream over all others…

A: Solution: Given information: Margin of error = E = 0.03 confidence level = 80%=0.80 Level of…

Q: A population of N = 6 scores has ΣX = 42. What is the population mean?

A: Given ,Population of N=6 scoresand Σx =42

Q: The Canine Gourmet Company produces delicious dog treats for canines with discriminating tastes.…

A: From the given information, Process average weight per packet is 41 grams. That is, x¯¯=41 The…

Q: Suppose multiple samples of size nn are drawn from a population with a mean of 50. The mean is…

A: Population mean =50

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: a) Compute the required sample size using the formula: E=zα2 p⏞11-p⏞1n+p⏞21-p⏞2n   Where 'E' is the…

Q: Provide an appropriate response. A researcher wishes to estimate the number of households with two…

A:

Q: A recent survey estimated that 19 percent of all people living in a certain region regularly use…

A: The 100 (1 – α)% confidence interval provides an interval estimation of the required population…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: Suppose the manager of a shoe store wants to determine the current percentage of customers who are…

A:

Q: ple of 1000 Americans, it was discovered that 920 of them lived in neighborhoods with acceptable…

A: The point estimate (sample proportion) of the sample of size n can be defined as: p^=xn  Here, x =…

Q: High levels of cholesterol in the blood are not healthy in either humans or dogs. Because a  diet…

A: The tables shows the summary statistics for blood cholesterol levels of pets and clinic dogs.

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

A:

Q: 2. Based on true statistics, list the numbers of confirmed cases of coronavirus COVID- 19 for any 10…

A: a. Let 25/11/2020 represents the day 1 and the confirmed cases of the consecutives days are listed…

Q: In recent years, approximately 55% of eligible voters take the time to vote in presidential…

A: Givensample size(n)=200x=128α=0.05

Q: 8. Use the figure to the right, which shows the percentages of adults from several countries who…

A: Given Information: Country A: Sample size (n1) = 1003 Sample proportion (p^1) = 49% = 0.49 Country…

Q: A team of researchers would like to determine whether the number of households that use the internet…

A: The correct option is ‘these samples are independent’.Explanation: The two samples which are derived…

Q: An Internet survey asked 525 Facebook users whether the amount of time they spent using Facebook was…

A:

Q: To estimate the population mean µ with a 85% error margin of 2.5 units, 10) one has determined that…

A:

Q: It has often been suggested that students study 2 hours per week outside of class for every credit…

A: The 95% confidence interval for the average number of hours studied outside the class per week per…

Q: If you want to be 99​% confident of estimating the population proportion to within a sampling error…

A: From the provided information, Confidence level = 99% Margin of error (E) = ±0.05 Proportion (p) =…

Q: Determine the test score of John in Statistics if he has a z-score of 1.9. (SD = 4, mean = 85)

A: Given that in statistics, John has z-score of 1.9 where mean score is 85 and SD is 4. Here, to find…

Q: The manager of a city recreation center wants to estimate the percent of city residents who favor a…

A: The confidence interval for the population proportion (single sample) is obtained by using the…

Q: A researcher wants to determine the percentage of American teenagers who send or receive text…

A:

Q: A consumer group claims that the mean annual consumption of cheddar cheese by a person in the U.S.…

A: Claim: The claim is that the mean annual consumption of the cheddar cheese by a person in US is at…

Q: Suppose an advertising company wants to determine the current percentage of customers who read print…

A: Given dataError = 5% = 0.05Confidence level = 0.98Significance level = α=1-0.98=0.02

Q: A market researcher wishes to determine the proportion of American consumers who shop online for…

A:

Q: Suppose a company wants to determine the percentage of customers who shop online. How many customers…

A:

Q: Fifty people are selected randomly from a certain population and it is found that 12 people in the…

A: Sample size = n = 50 Sample number of events = x = 12 Sample proportion = p̂ = x/n = (12/50) =…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: