2. In a random sample of 150 drivers arrested for DUI (drunk driving), 90% were males. The 99% confidence interval for the proportion of male drunk drivers is:

Q: Of 363 randomly selected medical students, 20 said that they planned to work in a rural community.…

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: The figure to the right shows the results of a survey in which 1001 adults from Country​ A, 1002…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: what would be the 90% confidence interval of the true proportion of young adults who have received…

A: Given that sample size is n = 190 And the sample proportion is 70% = 0.7 At 90% confidence level,…

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: ) When 415 junior college students were surveyed, 150 said they have a passport. Construct a 95%…

A:

Q: In a random sample of 100 customers, the items that customers purchased were tracked. It was found…

A: Given,sample size(n)=100sample proportion(p^)=0.171-p^=1-0.17=0.83α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: By law, all new cars must have airbags on both the driver's side and the passenger's side. There is…

A: Given that  n=55 , X=35

Q: From a simple random sample of 400 of the 1,395 colleges in our population, it was found that…

A: Given : 1395 colleges in our population  Population Size (N) = 1395 400 colleges selected randomly…

Q: a survey of 3088 adults aged 57 through 85​ years, it was found that 87.1​% of them used at least…

A: The formula for computing confidence interval is,  n is the sample size and P is the proportion.

Q: In a sample of 100,40 said they preferred Pepsi to Coke. A 95% confidence interval for the…

A:

Q: The data represent a sample of the number of casualties in a road accident for the past several…

A: Solution:   x (x-x) (x-x)2 450 -34.7143 1205.082 509 24.28571 589.7959 609 124.2857…

Q: uman resources managers, 71% of respondents felt they should hire new staff within the next three…

A: The Upper limit can be calculated as: Upper limit = Point estimate (sample proportion) + Margin of…

Q: You observe 60 customers at a coffee shop, and 82% of them tip. What is the 95% confidence interval…

A: Given : You observe 60 customers at a coffee shop, and 82% of them tip.

Q: In a random sample of 850​ Americans, 385 reported that they work two jobs. Which of the following…

A: The known values are, The sample proportion is,

Q: Suppose we observed 120 successes in a random sample of 300 subjects. What is the 98% confidence…

A:

Q: In a survey of 3110 adults aged 57 through 85 years, it was found that 87.9% of them used at least…

A:

Q: In a sample of 100, 40 said they preferred Pepsi to coke. A 95% confidence interval for the…

A:

Q: If n=41n=41, ¯xx¯=36, and s=9s=9, find the margin of error for a 80% confidence level.

A: Answer - Given, Sample size n = 41,    x  = 36    and s = 9               80% confidence interval…

Q: A local health centre noted that in a sample of 400 patients, 80 were referred ta hospital. a.…

A: Given, n = 400            x = 80 Therefore, population proportion p^ = 80400 = 0.2 The critical…

Q: At a large university in Conway, South Carolina, the Dean wants to know what proportion of students…

A: We have given thatn = 200x = 145Confidence level (c) = 99% = 0.99Significance level (α) = 1 - c =  1…

Q: the following sample was taken from a normally distributed population: 20,27,15,2016,22 and 13. A…

A:

Q: A recent survey of 54,000 randomly selected adults studied the religious affiliations of Americans.…

A: From the provided information, Sample size (n) = 645 From which 116 said they claimed no religious…

Q: A health insurance firm wants to estimate the proportion of a population that would receive the flu…

A:

Q: 1992, the women in two statistics classes for students in the liberal arts at a large northeastern…

A: In 1992, the women in two statistics classes for students in the liberal arts at a large…

Q: The analyst decides to test this assumption by collecting a random sample of 100 New Yorkers and…

A: The sample proportion is, p^=xn=65100=0.65 Computation of critical value:…

Q: A surprising number of young adults (ages 19 to 25) still live in their parents' homes. A random…

A: Required conditions: n1>30 n2>30 n1*p1^>=10 n1*(1-p1^)>=10 n2*p2>=10 n2*p2^>=10

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A:

Q: In a survey of 2480 golfers, 15% said they were left-handed. The survey's margin of error was 3%.…

A: Sample size(n)=2480sampl proportion(p^)=0.15Margin of error(E)=0.03

Q: You drop by your local independent coffee shop on your way to class. While standing in​ line, you…

A:

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: In a survey of 1002 people, 70% said that they voted in a recent presidential election. In…

A: n=1002

Q: In a survey of 3332 adults aged 57 through 85​ years, it was found that 80.7​% of them used at least…

A:

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A: Compare the length from the formula to the length of given confidence interval.

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A: Comparing the length of interval.

Q: A surprising number of young adults (ages 19 to 25) still live in their parents' homes. A random…

A: Required conditions: n1>30 n2>30 n1*p1^>=10 n1*(1-p1^)>=10 n2*p2>=10 n2*p2^>=10

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A:

Q: Of 102 randomly selected adults, 42 were found to have high blood pressure. A 90% confidence…

A:

Q: A study of 1907 traffic fatalities found that 725 were alcohol related. Suppose you want your 99%…

A: Given information Total number of traffic fatalities(n) = 1907 Number of fatalities, alcohol related…

Q: An insurance company selected samples of clients under 18 years of age and over 18 and recorded the…

A: Given Information: Under age of 18  n1=480 x1=160 Over age of 18 n2=500 x2=140